Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2bfeed5f6a80c4…

MALICIOUS

PDF

46.3 KB Created: 2020-08-12 01:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3698a8a2e77903e14e1f332049d73443 SHA-1: 491b99c6267664559ec897a6e4d019191ba68013 SHA-256: 5c2bfeed5f6a80c43e7b17360bd491e2790ea7ad467c9f4ef563f37bff2f48f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is also identified as an SEO link farm. The document body text and embedded links suggest a lure related to 'Gmat probability questions and answers pdf' to entice users to click the malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous external links, many hosted on Shopify, likely part of a link farm to obscure the final destination.

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=gmat+probability+questions+and+answers+pdf In PDF document text
    • http://files.rylcult.com/uploads/1/3/1/3/131379409/fetub.pdfIn PDF document text
    • http://files.florarosatherapies.com/uploads/1/3/1/8/131872055/4659144.pdfIn PDF document text
    • http://files.vbstemtrifecta.com/uploads/1/3/0/7/130775245/4876332.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/1/0431/2875/0234/files/29665072810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/pexemugadosupekepamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/katumofadajovagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/telebevirosalanidirep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/kanobolikaxowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/94767642145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/84257150265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/noves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/xiwapus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/libro_cazadores_de_microbios_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/gupexubepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/gaxedajekaxubebujevux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8371/0108/files/cadena_de_suministro_global.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AC 5680 bytes
SHA-256: ead7cf3f20ee64c48e2f988cfeeaace528d540ccbcea0ee5bd6c49cf77447472
font_01_sfnt_off000088f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F5 10416 bytes
SHA-256: 456077068d5ef0cb0f55581764ff2f3175822bef5b359470bb046f2a2be89fc9

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