Malicious PDF — malware analysis report

Static analysis result for SHA-256 1924bd75a48d3f24…

MALICIOUS

PDF

36.5 KB Created: 2020-08-10 07:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7afd51493d4a206c9413870c89b58fe3 SHA-1: a6e4c4de2a13beb7ec40382d89152711e577d491 SHA-256: 1924bd75a48d3f2468a41c65e94f8b2baa1d379d1e1f3a90065d001d43e387c8
194 Risk Score

Malware Insights

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

This PDF document acts as a lure, masquerading as a free download for a medical encyclopedia. It contains a high density of links pointing to a redirector infrastructure, which in turn leads to a link farm of other PDF files. The primary redirector URL is https://ttraff.ru/pify?keyword=medical+encyclopedia+pdf+free+download, which is flagged as malicious. The document's structure and extensive linking suggest an attempt to manipulate search engine results or distribute further malicious content.

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=medical+encyclopedia+pdf+free+download In PDF document text
    • http://files.nirunutrition.com/uploads/1/3/0/8/130814052/1316723.pdfIn PDF document text
    • http://files.jvonhdesigns.com/uploads/1/3/0/8/130814868/26e94e.pdfIn PDF document text
    • http://files.troop3mbts.com/uploads/1/3/0/9/130969731/tilapujedasimuvuxud.pdfIn PDF document text
    • http://files.made2measurehomerenovations.com/uploads/1/3/1/4/131453453/487126f3707.pdfIn PDF document text
    • http://ribalo.bigislandbeekeepers.com/uploads/1/3/0/8/130874655/e14d6a5593.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/1/0432/0549/2904/files/nupipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/67703209997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/vampire_the_masquerade_core_rulebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/zijafawoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/wukazab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/99479528098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/gikofajijipoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/pdf_file_attachment_settings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/77235689059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/impact_of_bullying_in_schools.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_off000050ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50CE 5168 bytes
SHA-256: cafbf4e3f284e05f26de8ef1c4cd55f7ace180ba4769def0fe048ea063a3b11f
font_01_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 10152 bytes
SHA-256: da1bca36ad7fd85d9b3f5ef8301efac42d396a535c1dd2186ae777023d5e9a39

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