Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c8935d02dc3d25…

MALICIOUS

PDF

51.1 KB Created: 2020-08-07 04:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fcaa57011bf5745cad8b17daca4e41d SHA-1: ed72db19b07c33d9f0db4b21914763b2a81b4060 SHA-256: c4c8935d02dc3d258617fd12ac7519a4549728b3a178c45fc5535b5e27316b90
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector. The primary malicious URL is 'https://ttraff.cc/pify?keyword=definition+of+validity+in+research+pdf', which is designed to lure users into clicking by disguising the link as research material. The PDF also contains numerous other links to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector and link farm strongly suggests a phishing or scam attempt.

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=definition+of+validity+in+research+pdf
    • http://files.petrabrown.co.uk/uploads/1/3/2/6/132681409/ketevenebijuz.pdf
    • http://files.calvarychapelwesttexas.com/uploads/1/3/1/4/131438216/08a97d87f3d68.pdf
    • http://files.iamproductionstt.com/uploads/1/3/2/7/132740723/bakolada_semibap_zuxorole.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/loveseletatinevek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/16376464333.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/56323220429.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/13643047491.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/the_sims_deluxe_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/94430849029.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/65118831187.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/64932187596.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.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_off00008a1d.bin
4d1258e6e106834d7244534a39cc238b06be719f897ebe9b1f1f6558814ed73f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1D 5404 bytes
font_01_sfnt_off00009c93.bin
5beaa43076b3c2e765eb0319eebe5e5a0d55a9764f5a75bf57a395975417a4e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C93 10072 bytes

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