Malicious PDF — malware analysis report

Static analysis result for SHA-256 401c95107c883058…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 12:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c06290cd4db3bbb85810ba348cb6e135 SHA-1: ec7453094d35f2474bfa1101e6ab58131158b9f0 SHA-256: 401c95107c8830580407945f583a49a4bbda62ee0ebab65493c13479f52407d3
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are highly suspicious and likely lead to malicious content. The document body itself is largely unreadable binary data, but the presence of URLs within it reinforces the attack pattern.

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=case+files+internal+med+pdf In PDF document text
    • http://files.bluecollarhomeschool.com/uploads/1/3/0/8/130814070/xuvozafumerojiputuw.pdfIn PDF document text
    • http://nipaso.climatefx.org/uploads/1/3/1/4/131437044/zegiguxabodonuxa.pdfIn PDF document text
    • http://nevazux.americanhomerealtyinc.us/uploads/1/3/1/6/131606490/goxupudoj_tiguleran_tetobavo_kexalabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/google_translate_arabic_to_english_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1089/8595/files/tazurowavuzegatifufutin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/99460498628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/25757386029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/alternative_investments_caia_level_i_wiley_finance_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/the_keto_reset_diet_cookbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7854/8630/files/zeziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/puzelewurefixagujenadutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/33489017508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/3633397750.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 4888 bytes
SHA-256: cbfd7177a6c00903b801ec6a84b5dbbf00ca07db8e276c94f960f076a056e761
font_01_sfnt_off0000705c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10460 bytes
SHA-256: b17e49d46ddf474ae3fb3b1b7337d4b8db3c8b1534c16db56801957350e98906
font_02_sfnt_off00009404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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