Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54f3e9ae21ec52e…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 09:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97dfefa6e9c6d7694a809131add21a31 SHA-1: 252225b41dbe957eca94f863549dd3f0d00f0bf5 SHA-256: a54f3e9ae21ec52e4975dafdb14dfe19c14fffd63ba6c2d211613d0af2709b83
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.cc/pify?keyword=advantage+software+eclipse+manual'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other URLs hosted on Shopify and various domains, suggesting a link farm or redirection strategy. The presence of numerous external PDF links further supports the link farm heuristic.

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=advantage+software+eclipse+manual
    • http://rafix.leaguesforpickleball.com/uploads/1/3/0/8/130874493/1329864.pdf
    • http://jetinipuz.ttandeuropemotorcycleadventures.co.uk/uploads/1/3/0/8/130813834/16b02fdc8e.pdf
    • http://files.klarahorackova.com/uploads/1/3/1/4/131437702/zunetamilezuju.pdf
    • http://subezepip.stayinginvienna.com/uploads/1/3/2/8/132814930/13dff3f1.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/37158473933.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/86017433337.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/dana_300_twin_stick.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/54455513686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/jetovokulesiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2332/files/oxford_learner_s_thesaurus_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/10914439575.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/tetutopasinibemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2111/5298/files/duzuzapawomibubuxidowoxoz.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/search_only_fors.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.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_off00007172.bin
01df771c4fdeed3e3bd008112ae061c5c01bb06c8b3c413692bae944f3f9ad81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5616 bytes
font_01_sfnt_off0000848f.bin
8599e23287f66bdfbf170593f7b367636a5ba791aefc7b80240054789950f460
pdf-font-stream PDF embedded font (sfnt) at offset 0x848F 10732 bytes