Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ad203c238edbab…

MALICIOUS

PDF

67.1 KB Created: 2020-12-23 08:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aba11fadb9f5110511dba0de81d212a SHA-1: d5c38216363c6ad98ab4302b4572ad1f3458deee SHA-256: a2ad203c238edbab5d9c22d71ec57cb6c3260f60baabd46082276c19c16469c9
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. This URL is presented to the user under the guise of "Best guitar rock and roll songs", indicating a phishing or redirection attempt. The ML classifier and ClamAV also flagged this file as malicious, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=best+guitar+rock+and+roll+songs
    • https://cdn-cms.f-static.net/uploads/4478951/normal_5fbba0539a05c.pdf
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5fe07e8f13988.pdf
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fb885e298cb1.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_5fa3e534d39b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e916d21f-7eca-4cfc-85b2-ca3911a88667/15540808061.pdf
    • https://s3.amazonaws.com/jezekemunidup/rajetivowaze.pdf
    • https://s3.amazonaws.com/mavixu/42832334613.pdf
    • https://s3.amazonaws.com/sibenuvokiwuz/2_hour_delay_schedule_scasd.pdf
    • https://s3.amazonaws.com/potamotaz/kumon_math_practice_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/bb682d47-8c44-4298-9788-da7889b65252/kenwood_th-22at_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c731.bin
797a6911cc6395d2398fd857f4bb6f9340bc3d84c1a0980ead3306a9c45b544f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 5220 bytes
font_01_sfnt_off0000d908.bin
368418c81e86bb174255deca7b5eb032322f3595f6aeabafefcdcde47ae3337f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 11516 bytes

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