Malicious PDF — malware analysis report

Static analysis result for SHA-256 6405b149e7fd334d…

MALICIOUS

PDF

46.4 KB Created: 2020-08-07 20:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e3faf1583bcf98f5a6ffdd0028680c7 SHA-1: b35711a518ec98b7400b2cbd74df72f21452111d SHA-256: 6405b149e7fd334d80b27bb87dc04e2c6de7fd7bec3077c6d2f6d235559acfb8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links that redirect to malicious infrastructure, masquerading as downloadable accounting materials. The primary redirector URL is https://ttraff.ru/pify?keyword=fundamentals+of+accounting+chapter+1+pdf, which is part of a link farm designed to lure unsuspecting users. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead users to harmful content.

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=fundamentals+of+accounting+chapter+1+pdf In PDF document text
    • http://files.comanchemethodist.com/uploads/1/3/0/7/130776594/8867026.pdfIn PDF document text
    • http://files.24volt.org/uploads/1/3/0/7/130738596/517a56611305.pdfIn PDF document text
    • http://files.nogears-nofears.com/uploads/1/3/0/7/130775366/f7d3b.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/1/0433/0687/7080/files/tovunegorudakumuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/68016258924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8379/1526/files/vedoluvanudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/suvegotir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/vesuwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2155/7147/files/86769713748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/kalineraroxowegujof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3166/4552/files/limodaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/46432844114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/68416734258.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 6

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_off0000754c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 5576 bytes
SHA-256: 6835cb53bb4139b87924bf5361d0ca2a10904aae2f374e10a06d82663c265add
font_01_sfnt_off00008821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 10788 bytes
SHA-256: 2726c7faf6d6eb19d2cd8baf36fcc91bb49aa55a7dd90df599ac2b4d5d5a5f38

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