Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a350bb36516196…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 19:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 604f1de1515807984eddf450029715b9 SHA-1: 7d332e57d9872d1693746dde4d0c8ac2dbab1525 SHA-256: 94a350bb365161962517bdf7171f7a840eb9f4bbd5f782572e68faebac1c6c66
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to 'ttraff.ru'. This domain is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL and a benign-looking PDF URL, suggesting a lure to disguise the malicious intent. The presence of numerous external links points towards a link farm or SEO poisoning tactic to distribute malicious 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.ru/wix?keyword=benchmark+fractions+worksheets+3rd+g
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/yelp_review_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/21203071560.pdf
    • https://cdn.shopify.com/s/files/1/0438/4263/3890/files/sojojazazaxabezegekegix.pdf
    • https://cdn.shopify.com/s/files/1/0467/9945/4359/files/finiwugan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/tofegikepezefuvu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9946/9464/files/46539633406.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_1d8c8e404efa4ece8b4ecbaa29d5c24d.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_5276fbe7ff674461bf7e74fbf6dfa09d.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/menitifaximis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/60421074694.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/69400653307.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/disuzopobanuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/vosomaporavumituwariren.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_off000059cb.bin
6427720c69649316f48ad13c880da43235dec9bb3cff2363a8a079c427cf8fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 5772 bytes
font_01_sfnt_off00006d42.bin
3031900112acae035b4a2e2908225b1720bfb819983b5ed027f1d316097452d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D42 10240 bytes

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