Malicious PDF — malware analysis report

Static analysis result for SHA-256 541407878124b3f0…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 03:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb7d3905c80fbab8ebf8e90e4f9c4fb6 SHA-1: 3ef244c4f872e791b860286a2f2f3b511ad25d78 SHA-256: 541407878124b3f0a4344678bb77b5926f1016cea3ec24da54fa72c5c2ce34ca
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=history+textbook+answers', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many pointing to Shopify domains, further supports the link farm attack pattern. No scripts were extracted from this sample.

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=history+textbook+answers In PDF document text
    • http://zudoxo.kellettcommunications.com/uploads/1/3/0/7/130738902/2036176.pdfIn PDF document text
    • http://files.kilmerschool.org/uploads/1/3/2/6/132681536/4142342.pdfIn PDF document text
    • http://files.goldendoodlesutah.com/uploads/1/3/1/1/131164023/sugapofoxodalef.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/1/0434/9689/8724/files/texturas_dibujo_arquitectonico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/advanced_cambridge_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/calcitonina_como_marcador_tumoral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2870/7485/files/86400_seconds_in_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/nyda_application_form_for_employment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/chimaira_resurrection_rar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2752/2723/files/tangential_acceleration_non_uniform_circular_motion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/ebook_bryophytes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/40035249270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/67272755856.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 4

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_off00005ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC0 5076 bytes
SHA-256: 57864d99e27943a986bd3be5bdf6b8311aba837f2884f99d8b688ed64b22bc65
font_01_sfnt_off00007027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 10024 bytes
SHA-256: 76c6fcefa3c5d4a22857de8e1f10b4d2d9493c9c5206dbe682f2956075e98d7f

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