Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f151f80bed96cb3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 10:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c26718edf17b3f8ce89de83cd1bcca SHA-1: b5bf8d0f309e3cdb40eb7cdaac148a0f7168f932 SHA-256: 9f151f80bed96cb313dece2692cd37e5f16070c704288ff0d599a3ad5b1ffaea
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a 'Tomb of horrors guide'. This link, https://ttraff.cc/wix?keyword=tomb+of+horrors+guide, is the primary indicator of malicious intent. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, with the initial one pointing to a potentially benign host but likely serving as a decoy or part of a larger distribution scheme. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is sufficient for a high confidence assessment.

Heuristics 3

  • 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.
  • 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/wix?keyword=tomb+of+horrors+guide
    • https://static.usrfiles.com/ugd/b8c837_1da6a373220e4bd8a96f493599bd8d68.pdf
    • https://static.usrfiles.com/ugd/c6ac46_027197e5c90142e3b3b6411e2affa067.pdf
    • https://static.usrfiles.com/ugd/804ff6_9986cf8889f84453b60fecf00e13ac9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e59049d69c4b45eb975085bc52814b9f.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_00fc96dcf3bc48f88d49e856f9c7b640.pdf
    • https://static.usrfiles.com/ugd/2f07a1_19fc0dfcd4164eb4ad7aa1b2e03bac20.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c86a6a768184e918a51f511b9c0e906.pdf
    • https://static.usrfiles.com/ugd/8b9728_bbd7bcd17c3b44489455168698281537.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcbed99362e3420ea838c0c4bbed583e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef0.bin
5afd8fbe70984cd640e8b190067f52cf9540b791ea2c4296d9c62d2efcdf709a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 5168 bytes
font_01_sfnt_off00008064.bin
7e347e6869f47a4fbe5131478b56d5b8ad0a22b196ad859655fd3a60396f37a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8064 10456 bytes

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