Malicious PDF — malware analysis report

Static analysis result for SHA-256 8596b877954b2f3d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 14:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fcc2f4015396caee28b8a94b430d91f SHA-1: f93840f1b2063c82db47507ed7cd2d6a49143797 SHA-256: 8596b877954b2f3d82d2fb63e41a4b0b54725e43cdc95edf5582234886817c9b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting a lure for users to download content. The presence of a malicious redirector and a large number of external links indicates a phishing or scam attempt.

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=crop%20image%20from%20pdf In PDF document text
    • http://files.cttntraumatraining.org/uploads/1/3/1/6/131606393/5b730abbd7ece.pdfIn PDF document text
    • http://files.nukkarepo.com/uploads/1/3/1/4/131437123/d6ded40bd8cde1.pdfIn PDF document text
    • http://vafamumu.daniellabloom.com/uploads/1/3/1/6/131606490/pubibexesisaxusuka.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/1/0431/2439/2087/files/physical_examination_and_health_assessment_7th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/femidevewogodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/administrao_de_micro_e_pequenas_empresas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/73850127362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/5075857890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/mipozikojurepadozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/51508132494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/dosebezapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/tonimixizasubad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/99976165642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/fojatuluzidodusuketef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 3468 bytes
SHA-256: 7b92d4ced847e4403df7e48e8803292951ee25fa30e6bf686ad7f0be05f1b03e
font_01_sfnt_off00006dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 5056 bytes
SHA-256: a2c181e19d9ae044c18178e2c5eb99eac3d0b3d65c48a68ddfefb328aff69479
font_02_sfnt_off00007ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED3 10016 bytes
SHA-256: 374eb4214e417320103b1cd318a73e2dcbe027bbef3d8ce5a6f2dab15b430bc7

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