Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f47271e8a3016f0…

MALICIOUS

PDF

109.0 KB Created: 2020-12-17 21:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 09a5b9893dd901a2836de7def60cc6f0 SHA-1: 52619fecfbd117ec60b961e2e20036c5b629c824 SHA-256: 9f47271e8a3016f02c72983226274fb66aca81e7fef06a005208eb169492a016
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, including a redirector to 'ggtraff.ru', suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated and unreadable, but the presence of numerous links points towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=navy+choker+white+uniform+with+large+medals In PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/muwovufi.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fc6d8661bb7b.pdfIn PDF document text
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/7004781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5fad952ad29c6.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/bafonurosilis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/penivele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fc6895-c9b0-4d72-857b-599680ac2b59/41802594963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e572b57-61f6-4837-9c06-c0ee06d1f229/eric_clapton_before_you_accuse_me_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335c8324-6fdf-41b4-8f8b-e24700e39684/pitadivetesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bdaf453-69bd-40c1-b164-05bec919add6/60879689873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4401aa8a-f968-4c77-9b7f-b6f98e278929/bible_exposition_commentary_wiersbe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc526639955c744b556fee0/t/5fcc29b433187724c4e29503/1607215541946/word_family_books_online.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_off00016aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AEC 5724 bytes
SHA-256: d65e723e1d0df48a9bd3b50eccf9f18494bea9882e86578621436b6ce8607e83
font_01_sfnt_off00017e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E62 11700 bytes
SHA-256: 005a9c1a367fe8b5ae9877dce397bb0d0d8d0dc53d809a57b1d0c871a9d5b989

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