Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b3987c55b967bb…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 15:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 928863addc9797f082191ee418394b55 SHA-1: 4ff6274bb1decdf129abf7d671db0845696117af SHA-256: c3b3987c55b967bb4de2254cf6888caab9cdd9310c3bed5ca5c3379afe456ba4
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=asvab+study+guide+book+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains text related to 'asvab study guide book free' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site.

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.ru/pify?keyword=asvab+study+guide+book+free In PDF document text
    • http://files.derbylineuu.org/uploads/1/3/1/3/131379406/2ff597c03.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/1/0428/0749/2775/files/sekiro_holy_chapter_infested.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/jutokapuxofeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/angana_padharo_maharani_mp4_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/arbeitslosengeld_2_antrag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/o_que_meio_ambiente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/desigualdad_mundial_branko_milanovic_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/teputejat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/rewakonazevo.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_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 5400 bytes
SHA-256: a4f1726b0deaa007fcbdc310110660d7b5dc5b698894f8501beb57e15e63d91d
font_01_sfnt_off000075e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 10128 bytes
SHA-256: 03a9b2785c88c7fbd6a680df573d629720f6c48f1fe18a6e81cfadb1099970c3

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