Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88d0f81195f7659…

MALICIOUS

PDF

68.2 KB Created: 2020-12-21 12:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 31895e33366ecf772201cfd314322f98 SHA-1: 284a29024b63d8ada5b2720c46c294ae9c3f0339 SHA-256: b88d0f81195f76596348f9c9877bca77520fc000795069290dab107b73cf85da
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, traffking.ru. The document body, though heavily obfuscated, contains text fragments suggesting it is a lure related to 'Ragnarok online merchant guide'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=ragnarok+online+merchant+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fbb968c36a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f89356dc4506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fda807c39b55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc70965d8e4f44799649d53/t/5fcb6fc40814be4f73e9233d/1607167941048/zuguxodezotifedosuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8e42fd-4fc3-49c4-9422-e8decf29d32a/biwedalajarusubuvurezal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1636f7fb-58f0-4989-9f4b-2fd30bd4df40/gifikikod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0762c82-0c65-4099-84fb-68c9c7e0f820/toraxokin.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/rowdy_sheeter_hebbet_manja.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5135716f6d44b07d97325/t/5fca92ef6ab1a7206db64064/1607111408670/julusabanafuwijinifelajip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb29f7c1-cd6f-4157-a6f8-c6714039c9bb/resapofunojugujufotube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21da85a5-c0b7-4af8-b52e-eaebf08408dc/a_l_orient_l_toile_a_paru.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/42557967017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce396db-67a8-418d-9096-7dfddbabcc57/togujusapa.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_off0000cdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD9 5244 bytes
SHA-256: 3b7409effaa0c1ab62c7cac7f89a8798af5a3ca55ee450697d1173e3aab0462f
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 10884 bytes
SHA-256: 6da4eb0546d62a381a63d0e2462801778d80d5ca5ccfaafb0eab4d820cdcc036

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