Malicious PDF — malware analysis report

Static analysis result for SHA-256 25537e38fd9d5709…

MALICIOUS

PDF

45.1 KB Created: 2020-08-11 10:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 037a0e4c036f296a9c6363e99dd4c43e SHA-1: 541e522f99a2844d5f3776b5dc018b8fe94d11ca SHA-256: 25537e38fd9d57092cb9cea8811e386cc3147f151a049fe7ee94add85527293f
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 for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wb?keyword=all%20quiet%20on%20the%20western%20front%20chapter%206%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the book title and the malicious URL, suggesting a lure 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/wb?keyword=all%20quiet%20on%20the%20western%20front%20chapter%206%20pdf In PDF document text
    • http://files.aesopinstitute.org/uploads/1/3/2/6/132681660/2585823.pdfIn PDF document text
    • http://files.bloomwhereplanted.online/uploads/1/3/0/7/130739490/gifen.pdfIn PDF document text
    • http://files.zeenie.com/uploads/1/3/1/4/131453151/funatavad-luvez-luxenud-buwidasimudo.pdfIn PDF document text
    • http://files.heartofyogarva.org/uploads/1/3/1/4/131437242/3823239.pdfIn PDF document text
    • http://files.bonnieinfrance.com/uploads/1/3/1/4/131406433/e497163.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/1/0437/8309/4434/files/14878519114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/79245974051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/2002_dodge_durango_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/premedicacion_de_anfotericina_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/liwadaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/vupesinenigof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/java_interview_questions_and_answers_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/nuxexopagilobolezivimega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/sq11_mini_camera_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/73024244318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/29971411645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2516/8544/files/75617431000.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_off00007172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5604 bytes
SHA-256: dd3ce92b8b242cd3ade320e7deb13cd30da23c2ad444b6046edf4e86aac483be
font_01_sfnt_off00008496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 10172 bytes
SHA-256: 5cb632c0a3d8055317496078f58211f4a9bdbf75da3927e855375cd279131a3b

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