Malicious PDF — malware analysis report

Static analysis result for SHA-256 3925d8f5c7a0e832…

MALICIOUS

PDF

71.7 KB Created: 2020-11-24 22:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1eea69fcbd2d8053f82e30260815dc27 SHA-1: 748659b9ab0d99e0d4b032c39f2c94cd5659d541 SHA-256: 3925d8f5c7a0e832311bfce1e770813d525cee42cf735a4912817130679c487e
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and point to redirectors. The primary malicious link identified is 'https://gettraff.ru/strik?utm_term=blues+licks+saxophone+pdf', which is flagged as a malicious redirector. The document's structure and embedded links suggest it is part of a link farm designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=blues+licks+saxophone+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fae38c9944bc.pdfIn PDF document text
    • https://tinorivixi.weebly.com/uploads/1/3/4/6/134627636/2606715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8df29b8cec4.pdfIn PDF document text
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/2733405.pdfIn PDF document text
    • https://nulejekenafu.weebly.com/uploads/1/3/4/3/134367691/kobezumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5faa68ea2260c.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8290707.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/c536d7de9.pdfIn PDF document text
    • https://kupefuvewugixo.weebly.com/uploads/1/3/4/8/134849821/zolezoninipupemumix.pdfIn PDF document text
    • https://gozisali.weebly.com/uploads/1/3/4/6/134670052/cab249ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_5fa58b39224df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5f9cc236b91e0.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/womugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pujirageg/92617226733.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/xowalevisesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a39894-4f6f-4508-a572-4a11ae706ea2/9281157006.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA3 5132 bytes
SHA-256: 2e08cfee51448b274ead8fd21c6823269fe0d7526000da11dc7a5a2f426bf0a8
font_01_sfnt_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 10384 bytes
SHA-256: eef4ee233d65ca41438b961ccae2b72eaa57550284dd035256c37bedb83ae56d
font_02_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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