Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa73e8b81b26524b…

MALICIOUS

PDF

63.9 KB Created: 2020-08-14 06:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa371cc2d7ec7a7f802031fc3c64ba68 SHA-1: 81502a4c65c0fa2723a3d313161681b83a3212a6 SHA-256: fa73e8b81b26524b4ddc9608015dae1fad01ef79c92a99d01892aa4517fcc978
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=jogos+psp+em+portugues
    • http://latodo.galang-kangin.com/uploads/1/3/1/6/131606457/dujelate-jezijiluluzek.pdf
    • http://wirelaba.heartandmindhomeschool.com/uploads/1/3/1/4/131410685/bowek.pdf
    • http://files.centrallyesl.com/uploads/1/3/1/4/131438629/652979.pdf
    • http://bixod.bluedolphineo.com/uploads/1/3/2/6/132681821/zelatog.pdf
    • http://files.shirazpastryconsulting.com/uploads/1/3/2/6/132696558/bijularowamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/difujotoxaxasekizon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/46646840897.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/41262215614.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/puxasadatoku.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/guxonosatitivugexosanebun.pdf
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/principles_of_behavior_modification.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/tuvitojude.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/sozusozukojesozazajed.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/vazewifipuvabebugere.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/30637312539.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/befotajotevawogesu.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_off0000aee8.bin
af4ba6e99afc58d2d45f2fc99fb04261404ce5c40dbddceb502d073a3adfc086		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE8 4884 bytes
font_01_sfnt_off0000bf78.bin
3c87cc279b3d133a9255890537649fbd1d94160141dc9ddaf09c5fb44e5e9f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF78 16168 bytes

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