Malicious PDF — malware analysis report

Static analysis result for SHA-256 438dc8c54709d940…

MALICIOUS

PDF

42.0 KB Created: 2020-08-28 23:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45d1e55b0e2cc96eb9fb75885609d620 SHA-1: ef7a94a38ccc657cfc474e1c87770636ace981be SHA-256: 438dc8c54709d940d8e152e3c45beefb27ebdc3b7a361febf4c7174ce4c82d5b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=hiit+workout+routine'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL. The presence of urgency language further supports a phishing or social engineering attack pattern.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=hiit+workout+routine
    • https://static.usrfiles.com/ugd/b8c837_17c8f6c4e40b4f0fa3f29c9311347c6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_74726b9b4fba41a4a90d5fc8d2fd26b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b525a2971e46f187e573606558a986.pdf
    • https://static.usrfiles.com/ugd/b8c837_9690b3e34f7743159963d5027f40e0e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eaebefef42b4d12b2474f6936f870e8.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5837/files/stephen_king_riding_the_bullet.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/78864527134.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/gmat_example_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/zefolozesibogufatipop.pdf
    • https://static.usrfiles.com/ugd/b8c837_529951ec6117469db58261daf5e5997e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d97030adb904e1da4e1960c69db5cda.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac4be774ca5b438e9e2f23ee1d73a232.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_off00006973.bin
5da75ed0fdbce5bb3c1f83ecedd94d75a28f5f627204e06b3b018972c859773d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 4376 bytes
font_01_sfnt_off0000786a.bin
2958003e6be2f82ce1bbaed17ce330967735240f32c32287ac14c50d710a3f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786A 10268 bytes

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