Malicious PDF — malware analysis report

Static analysis result for SHA-256 30991e474f57157e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 19:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b912ad9922659dd1431276fe8c4b499 SHA-1: c3096874c1a2188bf90a30202b2bbc0834924e8a SHA-256: 30991e474f57157ec459c5a8e6bcbda90be31cc89ad3bf7e5eb35e9be728be30
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'skf bearing units catalogue pdf' and includes the malicious URL. The primary attack pattern involves luring users to click on these links, which redirect through 'ttraff.cc' to other hosted PDFs, likely as part of a link farm or SEO manipulation scheme to distribute malware or phishing content.

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/pify?keyword=skf+bearing+units+catalogue+pdf
    • http://gojaka.justinpearsongalleries.com/uploads/1/3/1/3/131383770/figovijujo_danobodikem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/98336234608.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/81030961939.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8391/files/4049193200.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/ginixapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/vozatuvibobimokud.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/29941565693.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/pdf_file_reader_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/59403480188.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/74987174371.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/tigovimeduzejamobuxak.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_off0000614b.bin
713464f39e0ce451a5e687ad13d12946d88bb17b620ca038e54dc397e59a44cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 5628 bytes
font_01_sfnt_off00007477.bin
23ed816280cb57edf49a6c91e3d48b8d2e339836c5bc58b85def5c7939a4e778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 9700 bytes

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