Malicious PDF — malware analysis report

Static analysis result for SHA-256 37699a587f53e6df…

MALICIOUS

PDF

17.8 KB Created: 2020-10-02 16:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7528322682daac3f330b590c940ac61e SHA-1: e6f7bee0cd0e8942b6482ead0139bc0dcda4f723 SHA-256: 37699a587f53e6dfff07f3695594c7b3b1394441d31b06668100a2b288e34c44
122 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 3

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=branches+of+philosophy+and+their+relevance+to+education+pdf In PDF document text
    • https://site-1038631.mozfiles.com/files/1038631/rubodada.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/95922853484.pdfIn PDF document text
    • https://site-1039553.mozfiles.com/files/1039553/49226832228.pdfIn PDF document text
    • http://juzas.columbiacountyuco.com/uploads/1/3/1/0/131070374/noxobor.pdfIn PDF document text
    • http://lenekoka.dentalcontact.ca/uploads/1/3/2/8/132814900/9527044.pdfIn PDF document text
    • http://files.marjoriethelen.com/uploads/1/3/1/4/131406289/riwifowemimuvaf.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/13896880208.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/73976659516.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/59949859851.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/87259922835.pdfIn PDF document text
    • https://site-1038958.mozfiles.com/files/1038958/29195068247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbef2a9f-973a-4660-8a93-c8d98830549c/48169916485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1a3945-c769-4b07-83e3-4702e48fd188/jametukuvosukaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87587c65-b239-41f9-8751-ab8f3c057b72/41071367363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e954c09a-a198-422a-bac6-28981db7c22a/zuweni.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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