Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ff250c1999f456…

MALICIOUS

PDF

38.0 KB Created: 2020-08-01 14:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c67686ec88dd46e4a536aa9eae5cb037 SHA-1: 382fcfedbf9afa62830a6b06c48cbd31210433ea SHA-256: 79ff250c1999f45658b2f5b6c7f6a943c1e515a926da76c174c666b06cf9bce2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The primary redirector URL is 'https://ttraff.com/pify?keyword=partial+differential+equations+strauss+solutions+pdf', which is likely part of an SEO link farm designed to phish users under the guise of providing free documents. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=partial+differential+equations+strauss+solutions+pdf In PDF document text
    • http://files.barnbridgehill.com/uploads/1/3/1/3/131380814/maluluko_duwazimume_vadujezax_nonotibus.pdfIn PDF document text
    • http://files.sunkistborderterriers.com/uploads/1/3/1/4/131406149/rapibajonutam_nawokuwe.pdfIn PDF document text
    • http://files.cascadecavaliers.com/uploads/1/3/0/9/130968961/8732006463.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/1/0427/7764/1116/files/61405163578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/tevasotaleko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/pefunuxutuwep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/pevipab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/93266839858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7383/0048/files/bawedowididizutilolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/22111249308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/difference_between_analog_and_digital_computer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/skyrim_anti_crash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/jibanebisupepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/74415702770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/wuxamefowafovopawamezido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8554/5124/files/89440617718.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 1

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_off00005791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5791 5164 bytes
SHA-256: b23bacd9e425fd5211d78ed4bb187a3a5d1edd777d4181b6d93c9121ff1b9768
font_01_sfnt_off0000692d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 9824 bytes
SHA-256: e6d02fec759cfc83fa078330d6b3733eb75772a5e0fe56aa132e190d19292c83

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