Malicious PDF — malware analysis report

Static analysis result for SHA-256 da83c801c093a796…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 13:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05b8615d8af99263657eeb0c0b425956 SHA-1: df23bff607126840e425b097ce7e9d7499362711 SHA-256: da83c801c093a7968e9da58d5ce0b599ff510481eec9f69a19c86ac0c3918225
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=excel+find+circular+reference'. This indicates an attempt to redirect the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to infer a phishing or redirection 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=excel+find+circular+reference In PDF document text
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdfIn PDF document text
    • http://files.jamesoakleyhumanist.org/uploads/1/3/2/3/132303061/06479e2557db14.pdfIn PDF document text
    • http://files.chris6photos.com/uploads/1/3/2/8/132814958/tokewowudifuxo-pojedofobu-kexabanuko.pdfIn PDF document text
    • http://files.openboxm.com/uploads/1/3/1/4/131408664/4267345.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/1/0428/9599/9129/files/3577513970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/xadinudazokojikaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/wizunokokilegasodavomudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/67919756380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/17587025709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/bufasekeded.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/40318310793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/fofefojexedum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/84837023898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/guruforufut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/79557911245.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 8

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_off000071d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 4860 bytes
SHA-256: d25043c03f78feec73391ed83c23e1fa801e9976f2e8d26b301255552b373ca6
font_01_sfnt_off0000826d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826D 10344 bytes
SHA-256: 40fc17afdb9714789a0bfeebdffa1c04f14c83c7fd9de8d80fe9721f3dab5d68

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