Malicious PDF — malware analysis report

Static analysis result for SHA-256 43737d0cb6c9321d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 23:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80fb0b84a8896232b4750b48de5a1a3c SHA-1: 49f9b09270d81411c7b68ba8cb6657568f313ed5 SHA-256: 43737d0cb6c9321d67efeb4be037eae0d9c0caeacca7add9eb9bf4eb6b0fe751
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=iso+9001+audit+questions+answers`. The document body also contains this URL, alongside numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely intended to redirect users to a phishing or malware download site.

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.ru/pify?keyword=iso+9001+audit+questions+answers
    • http://files.spaproductswholesale.com/uploads/1/3/1/1/131163943/6599963.pdf
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/attainment_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/fepetakevifarosiposev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/prentice_hall_biology_book_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/glencoe_algebra_1_3-_1_practice_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/backroom_casting_couch_compilation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7958/9283/files/battleground_survivor_battle_royale_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/93793130355.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/58348864997.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/52163875495.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_off00005c41.bin
9cb9b4cedd175f0f46039424346709673958fe4538d0e3bbbdf9f3a7a99e1086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C41 5176 bytes
font_01_sfnt_off00006deb.bin
0229854f978cbf38b81f8e75784ac732258ec7c94101b17b392f7cb0de5e6647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEB 9912 bytes
font_02_sfnt_off00008fd2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD2 4324 bytes

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