Malicious PDF — malware analysis report

Static analysis result for SHA-256 7caf9533aea2c5c4…

MALICIOUS

PDF

53.1 KB Created: 2020-08-23 08:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9449b78c5a2c7316d59fa9ff1a0c6bc SHA-1: 05af52d28ba30e7cf37333e7f354b1d4c46b3b89 SHA-256: 7caf9533aea2c5c49f027cc88cbcddbced6bb092b8fb1f5a13c17d1e21630a72
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Amfetamin' and includes the malicious URL. The presence of numerous other links to Shopify domains, some of which are benign and others unknown, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=amfetamin+ba%25C4%259F%25C4%25B1ml%25C4%25B1l%25C4%25B1%25C4%259F%25C4%25B1+pdf
    • http://sukasos.foundationjustice.org/uploads/1/3/1/3/131379759/d57a31.pdf
    • http://files.c3edu.org/uploads/1/3/2/6/132681725/0d441893551989.pdf
    • http://files.blue-owl.co.uk/uploads/1/3/2/8/132816087/zefaxuzowit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7969/files/bifekufuvuwifumave.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/grand_theft_auto_5_ps4_pre_owned.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/motor_vehicle_representative_exam.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/17649479026.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/7364210851.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/star_wars_the_rise_of_skywalker_metacritic.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/kojijaluni.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_off00006f73.bin
4efe7c4b861a7785942d052d2779312309280fd44d67e69b9f599349dfacea2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 5304 bytes
font_01_sfnt_off0000816b.bin
2b51e28059baff494be2b6c0e1b0f80a951d1ac937c6e3f6020ca1c31bad0739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816B 15936 bytes
font_02_sfnt_off0000b04c.bin
5935238e8e10e91f69a72039459809ee5afa495131852ebfd0764fde2575a951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB04C 16236 bytes

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