Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae73adfaeb116cc…

MALICIOUS

PDF

40.4 KB Created: 2020-10-05 05:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 734d463ab8861f060e1cef1024de884a SHA-1: 36e788187d249a7fce9d9bc14566be2f389cc8cf SHA-256: 8ae73adfaeb116ccf19b11681aea3ceb68a8fa19d248838cf158314bb63e018e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, identified as a link farm, directing users to potentially malicious sites. One prominent URL, https://cctraff.ru/strik?keyword=bubble+diagram+architecture+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, reinforcing the attack pattern of luring users to external resources. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • 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.
  • 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=bubble+diagram+architecture+pdf In PDF document text
    • http://files.afd22.com/uploads/1/3/1/3/131378837/poviwimeb.pdfIn PDF document text
    • http://xokupuza.villagespin.com/uploads/1/3/1/3/131384605/4783211.pdfIn PDF document text
    • http://files.cclorder.com/uploads/1/3/1/4/131437158/a2de1048c903e1.pdfIn PDF document text
    • https://site-1041206.mozfiles.com/files/1041206/22734777320.pdfIn PDF document text
    • https://site-1038360.mozfiles.com/files/1038360/wikig.pdfIn PDF document text
    • https://site-1039877.mozfiles.com/files/1039877/tunazumutuwujigo.pdfIn PDF document text
    • https://site-1037267.mozfiles.com/files/1037267/64006541838.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/70605f0b-1f2e-4a64-9514-5a0d90487007/nixuleketuduwapazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ce0e44-8d23-4c00-9569-0691e64428bb/68929303382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b80b57d-1f69-4c1e-bec9-0f335a9fb199/zibetukuwubudelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444013b2-766b-43b4-bace-b990c4976189/89292243521.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
🗂 Part of campaign: parishoflongpointbay.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5580 bytes
SHA-256: 834f83ac8a064563f8816916334b989b59a49216f94a7298adbf4830725ee0ab
font_01_sfnt_off00007383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 9660 bytes
SHA-256: 15e243ce2c95e30d568e10304f30eb1c82c1ba4a4b31bddfd6a99bb980ba0e2f