Malicious PDF — malware analysis report

Static analysis result for SHA-256 7666cf9a649ee60c…

MALICIOUS

PDF

43.8 KB Created: 2020-08-20 18:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 873b6839e870749103a02e4855223cae SHA-1: 1e6cdafbc981d1181f5babad3ca2383ded5e3552 SHA-256: 7666cf9a649ee60c01b1ba8f858a3b411c54a30cd0b17493b24ff0f5920ae93b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body text, though obfuscated, includes the same redirector URL and other URLs hosted on Shopify and various other domains, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=black+sheep+cycling+size+guide In PDF document text
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874207/2449c3a58288a.pdfIn PDF document text
    • http://files.coolcaribbeanvacations.com/uploads/1/3/0/7/130775837/c945b79.pdfIn PDF document text
    • http://files.drumartist.net/uploads/1/3/0/7/130775413/2446560.pdfIn PDF document text
    • http://files.emilysasia.com/uploads/1/3/1/4/131454286/zoxunutakava.pdfIn PDF document text
    • http://pezuvu.mollymcdavittcounseling.com/uploads/1/3/1/4/131453215/7fb911b682.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/1/0431/7980/2782/files/base64_encoded_file_php.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/24034835199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/51741226440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/7167439345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/android_game_controller_argos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/vuzupilalixagujaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/48377487562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/seguros_banorte_informe_medico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/80238334945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/39415409064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/56923296426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/80769231184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/78873560643.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_off00006c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5504 bytes
SHA-256: d5f2d13d267c70c10d1560ef6238db8e9b7226bea74c60bb8307c5a53bce4db4
font_01_sfnt_off00007ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 10280 bytes
SHA-256: 5bf110ae55ce980144f93d9adf1882395bfb00e11667aee5901effd77957d99f

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