Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af61a3b36921882…

MALICIOUS

PDF

43.0 KB Created: 2020-10-29 06:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: b0c82fd428a159ec9e804e3c6a7e1943 SHA-1: 8332290d9b345468d9c047c18be99b7e0dd591a5 SHA-256: 4af61a3b36921882ec38d752b368aedfd80464470e3ea22274bb5a9f72487e16
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/wb?keyword=pneumonia%20journal%20pdf%20free In PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/1895c8d81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f9245a70b3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f9472862de8b.pdfIn PDF document text
    • https://vemulasi.weebly.com/uploads/1/3/4/5/134509822/4021471.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/zofilex.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/tavoliguf-zadaxokodudekip-wulavepe.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/063c1.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/nobemo-fidep.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/1/0501/5827/2691/files/9707926245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8c29f0-03c6-48ad-9fb4-736182b4de48/17548614844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de9a006-0046-42a2-9c07-235f8d5f45ed/69434910277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8385/2695/files/mantiq_al_tayr_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170832f2-f407-4b2f-bf1a-affd6e10710d/kuzanofigedab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/vuvarul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7319aca7-c6ab-4101-9a0b-4faa4f0f29b9/30636925886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0460/7139/files/bideweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/kewufebekuverumubeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1129/2314/files/triangular_prism_nets_worksheet.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_off00006b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B43 5088 bytes
SHA-256: 8ef9452783aae26543cbb1cf1a5fd614fa3d4b07cbae92fe57b6fc50d472fabe
font_01_sfnt_off00007c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7D 10128 bytes
SHA-256: bb1af0bb85a77cfd33ab16dc9af91d74a1911b6276c89ddf9d1e92c994335da9

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