Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c860a023af0509e…

MALICIOUS

PDF

41.5 KB Created: 2020-09-19 00:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24bd9a841697ba12d71a2dde65251a23 SHA-1: 430eba16036e8e84f38dcafdeaba5341fcb9647b SHA-256: 0c860a023af0509e6c767452ce766904493e60cbe89f11bfd65460f4e0dfaca9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many of which point to a redirector hosted at 'ttraff.club'. This redirector is flagged as malicious and is used in conjunction with SEO tactics to lure victims with seemingly legitimate document titles. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.club/wix?keyword=chapter+6+study+guide+accounting In PDF document text
    • http://files.elevatednaturalhealth.com/uploads/1/3/1/8/131856491/385936.pdfIn PDF document text
    • http://zedega.tuscarorawildlandfirecrew.org/uploads/1/3/2/8/132814938/6783286.pdfIn PDF document text
    • http://files.jmptattoo.com/uploads/1/3/0/7/130776298/7575081.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/1/0432/3131/4077/files/18920330768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/tuzuxugukuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6081/2193/files/death_note_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/amar_chitra_katha_stories_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/zivexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1855/5292/files/cost_accounting_financial_statements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/vosifip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/29883913589.pdfIn PDF document text
    • https://e6e4acd8-5613-4d11-baf4-f06bd4ca461a.filesusr.com/ugd/805d2a_526de87d384b4b2eba04e990c2ef94c8.pdf?index=trueIn PDF document text
    • https://ca1b20b3-a59f-4a7f-b117-782c55d12975.filesusr.com/ugd/2e16aa_59f13711a728496d80396945a7246092.pdf?index=trueIn PDF document text
    • https://3e2286a8-dd05-48e1-9e9a-644a1d0eacff.filesusr.com/ugd/dcbeda_27d01bf617384aa1a396477853a4ca1a.pdf?index=trueIn PDF document text
    • https://a3c4841b-7b23-4e40-92de-95b773968cdb.filesusr.com/ugd/891219_c7f2237d372547219647feb4fde8ef17.pdf?index=trueIn 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 3

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_off000064b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 5464 bytes
SHA-256: ac2dc307371c80d74a6764f346dccd070950447425a9c3bffc13ec6b9046df65
font_01_sfnt_off0000774b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 9848 bytes
SHA-256: fad77049a13b492c22ce5287e9b2b8c9f46e4d48c7568ba864cc4868e2c2614f

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