Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9762cbf3849ad3c…

MALICIOUS

PDF

71.8 KB Created: 2020-08-15 18:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f3f850482145b691c35379d9de934b6 SHA-1: e1cd6569263ea11d0d7c185e21cc372d998dfbfa SHA-256: b9762cbf3849ad3cd85e570107cd0c50c118d64e48cf97d8f4b50c2188fa42fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be a lure using a fake academic journal template to redirect users to a malicious site.

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=international+journal+of+electronics+letters+template In PDF document text
    • http://files.sandifie.com/uploads/1/3/1/4/131408581/1996195.pdfIn PDF document text
    • http://gijumasi.nickoftimefilms.com/uploads/1/3/1/4/131407921/pixekurekata_wafosetamifaj.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/1/0431/3228/9178/files/1058898705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1915/5109/files/26547768630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/zujusigosejalomizawubom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/benafapimegosex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/tratamiento_absceso_hepatico_piogeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/payroll_system_thesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/45824941569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/kitavudozeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/zabusokaluveros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/treasures_grammar_practice_book_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/mepefavoxupuwudowu.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 5

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_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 5172 bytes
SHA-256: 3f85ed2a13f39f72b70ecbc66e1b3cebc6ede5fb8f87b32635c9f8b484e3b4e5
font_01_sfnt_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 10932 bytes
SHA-256: 8ac12d1a7986055cf4709dd814ffd40437baf17c17fc79b89cdecea53b0b4131

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