Malicious PDF — malware analysis report

Static analysis result for SHA-256 425a7768332c397e…

MALICIOUS

PDF

46.1 KB Created: 2020-11-06 09:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: ec205d25d74e4679852e683f8916dc3c SHA-1: 05a43064c17aa774a6cda87ecc18a1f8cc017091 SHA-256: 425a7768332c397ed7d088481bcded06c863ef7f69d224bd7a7fc189586fa600
194 Risk Score

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://traffking.ru/strik?keyword=school+wars+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8c8389f2de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5f8d60a959191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5f906839b4333.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/kutez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5f93236eb1a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fa1bb21d86de.pdfIn PDF document text
    • https://zobejonimofov.weebly.com/uploads/1/3/4/3/134354570/023a72fc50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bb0db1-ae1d-40ff-a74b-44694a7c96b0/what_animals_are_herbivores_and_carnivores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafd3b5d-f15c-498d-b242-055d5e1a9156/77603692947.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/wejofofisikajabuvuwodika.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mumezugawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f12b4c-df79-4aa7-a465-e9cffcd3372f/mayhem_madness_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/57404370817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30a3546-e7f4-40fd-993c-036e1b30b045/manual_for_frigidaire_gas_stove.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 5428 bytes
SHA-256: 245757acddc501a5783cf3d0799a184250dce02fddcbb57529f266beeb0c8006
font_01_sfnt_off0000869a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 11048 bytes
SHA-256: 124d88124e2fc1e40f5c8e3b639b21833427aab616856aa1eae5350aa48eb711

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