Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b7715fa45e34a6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 03:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6744d628918fd8b2b5e7bdbbbee77c2 SHA-1: 075918b09894ad201637a2e2851b66db568d428c SHA-256: 40b7715fa45e34a6c711e34cd2e9c4208aa0059f523b441f3c74c4022072d79c
150 Risk Score

Malware Insights

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

This PDF document contains a link farm and a direct link to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.me/wix?keyword=comment+faire+les+puissances+sur+wor', which is flagged as malicious. The presence of numerous external links, many pointing to Shopify-hosted PDFs, suggests a tactic to obscure the malicious destination and potentially leverage benign-looking domains for distribution. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=comment+faire+les+puissances+sur+wor
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/5999849821.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/aditivos_alimentarios_nuria_cubero.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/62917215865.pdf
    • https://static.usrfiles.com/ugd/ef7b09_c4358d7bafcc463785290c06da04bfa1.pdf
    • https://static.usrfiles.com/ugd/7f46b5_29cb30ebede54b84abd5aea2a66587fb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/87963616806.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/49343054796.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/89581311502.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/midoxavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/excellence_in_business_communication.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_off0000600c.bin
e9d9a7639cc9f330819119100c67392399f17f69937b1f74f48aaab5f84e7041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 5160 bytes
font_01_sfnt_off0000718c.bin
e8166c5859aa50c5fccb9c6d97315d8633f10ee1d848f4a6d599ed7d54bcd17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718C 11712 bytes

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