Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82e7a6545af0bc0…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 15:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2f4258dbadf90efc3641be12ce5d19 SHA-1: 3f5189d9bb3523b833f3aa07c0333e31740591e4 SHA-256: c82e7a6545af0bc0380d200719125b45ed917ce2cb713d1dadc903a7f020b353
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=uninor+internet+manual+setting'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise malicious content as a manual or informational document.

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.ru/pify?keyword=uninor+internet+manual+setting
    • http://files.bunchwashington.com/uploads/1/3/0/7/130739810/jizet.pdf
    • http://zilezoze.investwithsmdc.com/uploads/1/3/2/8/132814956/zutuzifixi.pdf
    • http://sebopenat.omninsw.waggamatters.com/uploads/1/3/1/8/131857120/zejenosatiza.pdf
    • http://files.adf64.org/uploads/1/3/0/8/130874329/xatulifa.pdf
    • http://zubekuzi.nhsjrotc.com/uploads/1/3/1/3/131379434/sonavixonev.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3167/files/kuxibulav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/18045420199.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/street_fighter_3_2nd_impact.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/5004636061.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/10057431519.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/lobufero.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/gozoxuzawupakevenogid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/61197687103.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_off00006126.bin
d440ffef73e64b84a10001a1df245890f6adacc197ad2a26230b477e3048e929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 4996 bytes
font_01_sfnt_off00007206.bin
34804201a47a1cef8d3d41040edda98379de7f4af0e900587e5a5d7e127fd193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 11320 bytes

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