Malicious PDF — malware analysis report

Static analysis result for SHA-256 a772d06e4aede9f6…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 12:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 531281a189b96ab9bf8eae559bd22f2e SHA-1: 918925f29ac2dbe6e6e4135dc5123cf62c24fb9d SHA-256: a772d06e4aede9f62b412a6813e1e12eeec078815a171867f5180e6bb1aba76d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, with the primary malicious redirector being ttraff.ru. This suggests the document is designed to lure users into clicking these links, ultimately leading them to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous links points to a phishing or redirection attack.

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=ice+sheet+vs+sea+ice+rimworld
    • http://files.mesacommunityclub.org/uploads/1/3/0/8/130813095/09405.pdf
    • http://files.celticdruidtemple.com/uploads/1/3/1/3/131398367/464da0e783d1.pdf
    • http://files.interfaithutica.org/uploads/1/3/2/3/132303286/zikibazetajeku-zixewijerobu.pdf
    • http://files.guesshowmuchiloveyoujewellery.com/uploads/1/3/1/4/131453062/3004337.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/glencoe_pre_algebra_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/rezosofuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/christine_hine_virtual_ethnography.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/muzexomuvisunirudojone.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/3._5_monster_manual_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/50784202196.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/628620407.pdf
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/sadawalurabekopokafojijur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5819/files/entrepreneurship_development_calicut_university.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/tadidof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/vunovawebu.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_off0000705b.bin
6cab51beeaf3384a5e728189abffe5f7e54e32150ffa4d0c7baa9199eee61551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 5268 bytes
font_01_sfnt_off0000822b.bin
44a4427a9ba76f75e0a82e0af7a99f255e458294ab723b383cba54f19ada2062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822B 10820 bytes

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