Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f813081c04ed358…

MALICIOUS

PDF

44.0 KB Created: 2020-07-28 07:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 942a98cd8e14607fa2276232780cdbfe SHA-1: ea2f213902c338acd16cd89bc82552cf929befa8 SHA-256: 2f813081c04ed358039c740922e1329a4c86c28e5cfc8293a89c92003fded61d
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a significant number of embedded links, a technique often used to redirect users to malicious websites or phishing pages. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to traff.ru, indicating malicious redirector infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass external PDF link farm, with the primary example being a Shopify-hosted PDF. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=old+canada+food+guide+serving+sizes In PDF document text
    • http://files.crimsonsoccer.us/uploads/1/3/1/8/131856195/dadumiwizavit_rovizojegor_gedupogunexuwo.pdfIn PDF document text
    • http://files.huronmarketing.com/uploads/1/3/0/9/130968963/047573f88.pdfIn PDF document text
    • http://files.mail.thespiritbutterfly.com/uploads/1/3/1/0/131071035/nuref.pdfIn PDF document text
    • http://files.afteredengallery.com/uploads/1/3/1/4/131453919/titina-biropiru-turonu.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/1/0428/9835/8432/files/78046530146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/65173494749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/kodiboruvofimupamumawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/64365691559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/21176200111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/mitujalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/tuxezewazatozipoluwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/sifazolezegasepotim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/najobilevuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/67460698969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/52902000244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/26742037734.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_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 5128 bytes
SHA-256: 92e7be0568e9d762c0356364b9f30776da7efe73c922e0b945313fca2cfa7c05
font_01_sfnt_off00008137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8137 9880 bytes
SHA-256: 4e91c2ef17ccd6832beee27e928ae741a3175845f57e5f2f4b09cb3c46c788aa

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