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) First seen: 2026-05-07
MD5: 03c32ea71140c019789f08b23e11493e SHA-1: a0a8f298dffb854fc54c63744121b6e5c6b19316 SHA-256: a831abb8e8d4ae023de6b921df27d3321544371efdbc11fe1e8f958cb921d3b7
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 In PDF document text
    • http://files.lucreciadesignsllc.com/uploads/1/3/1/4/131406344/bozutij_tojefiwojeve_nomotujego.pdfIn PDF document text
    • http://files.handsfeetandwings.candletothesun.com/uploads/1/3/0/8/130813146/7b2786d4.pdfIn PDF document text
    • http://files.rdrms.com/uploads/1/3/1/6/131636941/difidedelabazonusato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/jafolulure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/28599532458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/capacitation_of_sperm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/3._3._5_mining_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/94778091157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/2223970989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/64008929894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/93014371197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/45701512702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/boworivuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/bofugodawizexiwomevilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/77128981847.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BA 5492 bytes
SHA-256: 0a586c540574fd80cc2b1c42eedb5b305a075481e2a9b36718121ec22337886b
font_01_sfnt_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 10416 bytes
SHA-256: ec950184d043678f9e243c21a623385a54c17f5ff6c3c44ba237e673ab595188

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