Function at 0x4580e0
Capabilities:
Check if file exists
Delete registry value
Persist via default file association registry key
Set registry value

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x4d80d8
mov eax, dword fs:[0]
push eax
sub esp, 0x2c
push ebx
push esi
push edi
mov eax, dword [0x516108]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov esi, ecx
mov dword [ebp - 0x14], esi
mov dword [ebp - 4], 0
call fcn.004049b0
mov ecx, eax
test ecx, ecx
jne 0x458129
push 0x80004005
call fcn.00404710
mov eax, dword [ecx]
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x24], eax
mov byte [ebp - 4], 1
or edi, 0xffffffff
mov eax, dword [ebp + 8]
cmp dword [eax - 0xc], 0
je 0x458152
lea eax, [ebp + 8]
push eax
lea ecx, [ebp - 0x24]
call fcn.004021f0
jmp 0x458195
lea eax, [ebp - 0x2c]
push eax
call fcn.00456e70
push str.MasterPDF
mov byte [ebp - 4], 2
push dword [eax]
lea eax, [ebp - 0x24]
push str._s_s.exe
push eax
call fcn.004140d0
mov byte [ebp - 4], 1
add esp, 0x14
mov edx, dword [ebp - 0x2c]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458195
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov ebx, dword [ebp - 0x24]
push ebx
call dword [sym.imp.SHLWAPI.dll_PathFileExistsW]
test eax, eax
jne 0x4581aa
xor esi, esi
jmp 0x45864c
push str.MasterPDF
lea ecx, [ebp - 0x20]
call fcn.00404470
lea eax, [ebp - 0x20]
mov byte [ebp - 4], 3
push eax
mov edx, str.SoftwareClasses_
lea ecx, [ebp - 0x18]
call fcn.00432630
add esp, 4
mov byte [ebp - 4], 4
call fcn.004049b0
mov ecx, eax
test ecx, ecx
jne 0x4581e8
push 0x80004005
call fcn.00404710
mov eax, dword [ecx]
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x2c], eax
push 0
push str.SoftwareClasses.pdf
mov edx, esi
mov byte [ebp - 4], 5
lea ecx, [ebp - 0x28]
call fcn.004595a0
add esp, 8
push eax
lea ecx, [ebp - 0x2c]
mov byte [ebp - 4], 6
call fcn.004021f0
mov byte [ebp - 4], 5
mov eax, edi
mov edx, dword [ebp - 0x28]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458236
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov esi, dword [ebp - 0x2c]
cmp dword [esi - 0xc], 0
je 0x45828a
mov eax, dword [ebp - 0x20]
test eax, eax
jne 0x458250
push 0x80004005
call fcn.00404710
push eax
push esi
call fcn.004ba7da
add esp, 8
test eax, eax
je 0x45828a
mov ecx, esi
lea edx, [ecx + 2]
mov ax, word [ecx]
add ecx, 2
test ax, ax
jne 0x458263
sub ecx, edx
sar ecx, 1
lea eax, [ecx + ecx]
push eax
push esi
push 1
push str.previous.pdf
push dword [ebp - 0x18]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
push 0x18
push str.PDF_Document
push 1
push 0
push dword [ebp - 0x18]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
call fcn.004049b0
mov ecx, eax
test ecx, ecx
jne 0x4582b6
push 0x80004005
call fcn.00404710
mov eax, dword [ecx]
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x28], eax
push ebx
lea eax, [ebp - 0x28]
mov byte [ebp - 4], 7
push str._s_1
push eax
call fcn.004140d0
push str.DefaultIcon
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x34]
call fcn.004176b0
add esp, 0x10
mov eax, dword [eax]
mov dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x28]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x1c], ecx
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x4582f7
sub edx, dword [ebp - 0x1c]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push dword [ebp - 0x30]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x34]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458336
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
push str._shell
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x34]
call fcn.004176b0
add esp, 4
push 8
push str.open
push 1
push 0
push dword [eax]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x34]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458379
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
call fcn.004049b0
mov ecx, eax
test ecx, ecx
jne 0x45838e
push 0x80004005
call fcn.00404710
mov eax, dword [ecx]
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x1c], eax
push ebx
lea eax, [ebp - 0x1c]
mov byte [ebp - 4], 8
push str.__s_____1____
push eax
call fcn.004140d0
push str._shellopencommand
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x38]
call fcn.004176b0
add esp, 0x10
mov eax, dword [eax]
mov dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x1c]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x34], ecx
nop
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x4583d0
sub edx, dword [ebp - 0x34]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push dword [ebp - 0x30]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x38]
test eax, eax
mov eax, edi
sete byte [ebp - 0xd]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458415
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
push ebx
lea eax, [ebp - 0x1c]
push str.__s___print_to_default____1_
push eax
call fcn.004140d0
push str._shellprintcommand
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x30]
call fcn.004176b0
add esp, 0x10
mov eax, dword [eax]
mov dword [ebp - 0x34], eax
mov eax, dword [ebp - 0x1c]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x38], ecx
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x458447
sub edx, dword [ebp - 0x38]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push dword [ebp - 0x34]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x30]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458486
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
push ebx
lea eax, [ebp - 0x1c]
push str.__s___print_to____2_____1_
push eax
call fcn.004140d0
push str._shellprinttocommand
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x34]
call fcn.004176b0
mov edi, dword [ebp - 0x1c]
add esp, 0x10
mov ecx, edi
mov edx, dword [eax]
lea eax, [ecx + 2]
mov dword [ebp - 0x38], eax
mov ax, word [ecx]
add ecx, 2
test ax, ax
jne 0x4584b5
sub ecx, dword [ebp - 0x38]
sar ecx, 1
lea eax, [ecx + ecx]
push eax
push edi
push 1
push 0
push edx
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x34]
or eax, 0xffffffff
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x4584f3
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
cmp byte [ebp - 0xd], 0
je 0x4585af
mov eax, dword [ebp - 0x20]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x38], ecx
nop dword [eax + eax]
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x458510
sub edx, dword [ebp - 0x38]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push str.SoftwareClasses.pdf
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
push 0
push 0x4f47e0
push 1
push dword [ebp - 0x20]
push str.SoftwareClasses.pdfOpenWithProgids
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
cmp dword [ebp - 0x14], 0x80000001
jne 0x4585a6
mov eax, dword [ebp - 0x20]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x38], ecx
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x458565
sub edx, dword [ebp - 0x38]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push str.Progid
push str.SoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.pdf
push SysReAllocString
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
push str.Application
push str.SoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.pdf
push SysReAllocString
call dword [sym.imp.SHLWAPI.dll_SHDeleteValueW]
mov dword [ebp - 0x1c], 1
jmp 0x4585b6
mov dword [ebp - 0x1c], 0
lea edx, [edi - 0x10]
mov byte [ebp - 4], 7
or edi, 0xffffffff
mov eax, edi
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x4585d4
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 5
mov eax, edi
mov edx, dword [ebp - 0x28]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x4585f2
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 4
add esi, 0xfffffff0
mov eax, edi
lock xadd dword [esi + 0xc], eax
dec eax
test eax, eax
jg 0x45860d
mov ecx, dword [esi]
push esi
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 3
mov eax, edi
mov edx, dword [ebp - 0x18]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45862b
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 1
mov eax, edi
mov edx, dword [ebp - 0x20]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x458649
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov esi, dword [ebp - 0x1c]
mov byte [ebp - 4], 0
add ebx, 0xfffffff0
mov eax, edi
lock xadd dword [ebx + 0xc], eax
dec eax
test eax, eax
jg 0x458667
mov ecx, dword [ebx]
push ebx
mov eax, dword [ecx]
call dword [eax + 4]
mov dword [ebp - 4], 0xffffffff
mov eax, dword [ebp + 8]
add eax, 0xfffffff0
lock xadd dword [eax + 0xc], edi
dec edi
test edi, edi
jg 0x458686
mov ecx, dword [eax]
push eax
mov edx, dword [ecx]
call dword [edx + 4]
mov eax, esi
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret