Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30c819ebd10c90f…

MALICIOUS

PDF

71.2 KB Created: 2020-12-26 10:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b1b0e847b6520c407b787209733fbbe SHA-1: 6ae0301f6a695e635a017bc12e4b76db5f59bea0 SHA-256: e30c819ebd10c90fc31ce935afea79523528a10415301e84f7e6762ea72052eb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=stress+relief+exercises+pdf'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier and ClamAV also strongly indicate maliciousness. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=stress+relief+exercises+pdf
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fd9d417935ca.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f901a255268c.pdf
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fc01f3dc1250.pdf
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/kezifadakog_xukavaparig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nefagolom/dasikusivuz.pdf
    • https://s3.amazonaws.com/babetafaperaxov/airplane_crash_reports.pdf
    • https://uploads.strikinglycdn.com/files/f487288f-7b47-4f70-955c-677ce4f9816c/youtube_to_ringtone_cutter_online.pdf
    • https://uploads.strikinglycdn.com/files/fb8db606-0b71-4c91-8ec4-ec0e2dcb5926/28578933085.pdf
    • https://uploads.strikinglycdn.com/files/a4024302-4769-45d4-8943-f7e5f0599ccb/91535439566.pdf
    • https://s3.amazonaws.com/fakuguvil/needham_high_school_calendar.pdf
    • https://s3.amazonaws.com/zosevid/naruto_shippuden_ultimate_ninja_impact_ppsspp.pdf
    • https://s3.amazonaws.com/kiguteperilodu/vogue_paris_travel_guide.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_off0000dbc7.bin
3b61a029c221a527181475ca850326b76da79da8eed3225158c461333360ede2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 5112 bytes
font_01_sfnt_off0000ed45.bin
7ab17b55b278398ca2c4c64f2754e57fe4b3f677f7784355b4443306776f0f60
pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 10420 bytes