Malicious PDF — malware analysis report

Static analysis result for SHA-256 921cfd3f50a2777e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 19:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 840b0bcf1d632b44d2cce82188776ef8 SHA-1: cdadd5f6348993b6737f1f6207b39c23497d2417 SHA-256: 921cfd3f50a2777e6f356f23b8ce3de65002200cf8d1c1c8d8613a17cf01a5ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is further associated with a command lure instructing the user to 'add program to startup windows 10'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a social engineering attempt to trick the user into executing commands. The presence of a link farm heuristic also indicates a broad distribution attempt.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=add+program+to+startup+windows+10
    • http://files.centremarembo.org/uploads/1/3/0/8/130814669/delapobalodepu.pdf
    • http://fomizax.yyceliterenovation.com/uploads/1/3/0/9/130969358/gerafapexosas.pdf
    • http://files.keyscientific.net/uploads/1/3/0/9/130969577/3814619.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/togomuxaverebotimosegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/xujoruxutumufe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/sekiro_bite_down.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/kovagufunuwunuwegunun.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/86606664177.pdf
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/ford_5000_tractor_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/94949740753.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/game_of_thrones_audio_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/sekelozar.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/36545171919.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/60366024983.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/jopimapisom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069be.bin
64352fd0865b8fb7b26a8cf6228bbc5de5fc48a5a3e7a17d19cb8ffa855fd932
pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 5288 bytes
font_01_sfnt_off00007bb1.bin
78ae14094e2bebc50eaeabbc088276b47d6aa088713d4efd13eefe472f94d1f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10256 bytes
font_02_sfnt_off00009ec5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC5 4324 bytes