Malicious PDF — malware analysis report

Static analysis result for SHA-256 9411b93e045c0223…

MALICIOUS

PDF

104.3 KB Created: 2020-10-06 12:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 9e9955175327a5bd88b09fc2775b56b3 SHA-1: 4c4f6ce5ca805df091bd8a777fe93d29bda28cea SHA-256: 9411b93e045c02231ebb6b5a3647394e4d59a1d529659fe7c276eebabb885ce2
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of an SEO link farm and redirects to malicious infrastructure. The embedded URL `https://cctraff.ru/strik?keyword=a+field+guide+to+american+houses+pdf` is a known malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to trick users into visiting this malicious link.

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://cctraff.ru/strik?keyword=a+field+guide+to+american+houses+pdf In PDF document text
    • http://ganafelu.team-tubes.com/uploads/1/3/1/1/131164077/ruvakawa-puwejebuxax-wepabezinixop-koketonasew.pdfIn PDF document text
    • http://files.bigmikeroadshow.com/uploads/1/3/2/6/132682193/5815386.pdfIn PDF document text
    • http://files.clarawajngurt.com/uploads/1/3/1/4/131482991/ab1a5a7.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/d25fc0cf-0033-435f-baab-c6c4a8084cae/kulozapuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c322c4fb-ec67-4c07-94ea-2d651d620b24/jepuzosijevusolobugomined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c131d81e-f9c0-4452-ae06-ee661ec8e9ba/gilavugevujud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ec4f07-7b25-47ad-a6be-b6d66496975a/82564773552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c178c419-8e60-487d-9bed-db349fbb44b7/9875709161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485116b4-af02-4921-bebd-e7dd654ce8bf/38389813080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a0a905-b93b-4956-8a30-5dc93fe415e2/60430480169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89010180-ce3c-4245-aa0c-15246d051c6f/buvakapozenok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe45fa-ce3b-4f4e-9123-95169b530764/94357515309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7ba4fa-5ca8-4298-bc40-67d5630351b3/58895181823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6437d9-8467-4139-87aa-c7b26aa98cca/56600673028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd5896d-2303-4e84-96d5-fe3b26598d91/64999300086.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_off00015ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC9 5556 bytes
SHA-256: 39b54be5de19d9578a920af90a8977473543a4015effa731455eacb228be8c49
font_01_sfnt_off00016d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D8D 10672 bytes
SHA-256: 0626df6b8e003a449a78238d4a1fa99b9a0152589275233f28daba8f91198a89

Open this report in the interactive analyzer, or submit your own file for analysis.