Malicious PDF — malware analysis report

Static analysis result for SHA-256 a831abb8e8d4ae02…

MALICIOUS

PDF

63.3 KB Created: 2020-08-07 09:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c32ea71140c019789f08b23e11493e SHA-1: a0a8f298dffb854fc54c63744121b6e5c6b19316 SHA-256: a831abb8e8d4ae023de6b921df27d3321544371efdbc11fe1e8f958cb921d3b7
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large external link farm. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=behaviourism+philosophy+pdf', is identified as a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, but the presence of numerous links, including the malicious one, strongly suggests a phishing or redirection attack.

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=behaviourism+philosophy+pdf
    • http://files.lucreciadesignsllc.com/uploads/1/3/1/4/131406344/bozutij_tojefiwojeve_nomotujego.pdf
    • http://files.handsfeetandwings.candletothesun.com/uploads/1/3/0/8/130813146/7b2786d4.pdf
    • http://files.rdrms.com/uploads/1/3/1/6/131636941/difidedelabazonusato.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/jafolulure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/28599532458.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/capacitation_of_sperm.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/3._3._5_mining_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/94778091157.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/2223970989.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/64008929894.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/93014371197.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/45701512702.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/boworivuta.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/bofugodawizexiwomevilu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/77128981847.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_off0000b9ba.bin
0a586c540574fd80cc2b1c42eedb5b305a075481e2a9b36718121ec22337886b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BA 5492 bytes
font_01_sfnt_off0000cc50.bin
ec950184d043678f9e243c21a623385a54c17f5ff6c3c44ba237e673ab595188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 10416 bytes

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