Malicious PDF — malware analysis report

Static analysis result for SHA-256 2835fc2a50138e25…

MALICIOUS

PDF

36.5 KB Created: 2020-08-04 08:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959fa555a55f28ae4517947fb6051ced SHA-1: 202521f310cc3f27137125a599196b5f22b6d6c3 SHA-256: 2835fc2a50138e25bc114ddfce1308f41d707fbabe191d1080bbaa025d73aed6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link to a redirector hosted on 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same malicious URL and several benign-looking Shopify URLs, suggesting a link farm or lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' directly indicates the presence of malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' further suggests that the document is designed to host numerous links, likely for obfuscation or to increase the chances of a user clicking a malicious one.

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=statistical+inference+for+data+science+by+brian+caffo+pdf
    • http://files.en.inmatesvoices.com/uploads/1/3/0/7/130775704/xibugoveson.pdf
    • http://molesolif.commonplacebookshop.com/uploads/1/3/1/4/131407406/4367954.pdf
    • http://files.johannayaun.com/uploads/1/3/2/7/132712355/dapituligoj-koxewi-nanumizereje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0430/3562/3578/files/90633477660.pdf
    • https://cdn.shopify.com/s/files/1/0435/1331/5480/files/tebuziduke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/71331992244.pdf
    • https://cdn.shopify.com/s/files/1/0433/3010/9593/files/65693523544.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/fafumezuzavefadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/rixuluki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8923/9969/files/zanipoxujigagu.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_off00004f84.bin
07fabbd6e9e0618164697bb1fafb2ce42b65ad8cbef825dfde1704956b07248f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F84 5496 bytes
font_01_sfnt_off00006240.bin
864c0dab17d079da0ea8c5cedbb2fcaf7dd2419a4210ce9798e8f19a429f4bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 10136 bytes

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