Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f996957c94894a2…

MALICIOUS

PDF

72.9 KB Created: 2020-12-31 20:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8daaabf2868a5677aaad79d0980120 SHA-1: d6551331bef5ce3ade918a43efab92e462526967 SHA-256: 7f996957c94894a2629ed31cfd4a51b2f63ecb3e10f29bac31353ff32da4d5eb
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 'https://gettraff.ru/strik?utm_term=raven+dc+comics+movies+and+tv+shows'. This indicates the primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=raven+dc+comics+movies+and+tv+shows
    • https://cdn.sqhk.co/lanasido/KijzR3a/75343229582.pdf
    • https://static.s123-cdn-static.com/uploads/4489846/normal_5fe2acfdcb2e4.pdf
    • https://cdn.sqhk.co/kozuvurop/ahcjjhb/fewoluxez.pdf
    • https://static.s123-cdn-static.com/uploads/4465564/normal_5fe3e333f008e.pdf
    • https://cdn.sqhk.co/xogedusov/iew49jj/webakeseverubonixalezo.pdf
    • https://cdn.sqhk.co/masunidupag/djdSfci/happy_home_design_decor.pdf
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fa69b231efde.pdf
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fddd6e71da2c.pdf
    • https://static.s123-cdn-static.com/uploads/4383295/normal_5feb37cddd7f0.pdf
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa855e6241b2.pdf
    • https://cdn-cms.f-static.net/uploads/4490961/normal_5fe76e32f1b54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/09366e36-3cde-4afe-9cd7-aab7ef4510f5/wojanafevubujasotabu.pdf
    • https://uploads.strikinglycdn.com/files/9c357ce6-d398-4c84-bd02-f3f4d1d06773/38763394476.pdf
    • https://uploads.strikinglycdn.com/files/7b03cf03-0e62-4e80-a592-5c1691f38b63/zygor_guides_free_download.pdf
    • https://uploads.strikinglycdn.com/files/cdab462c-f2df-450c-aa9f-ec7371f05484/zuzixudobuvodawite.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_off0000df9f.bin
5069a01c33186db370a35b590e5f4a10dcce94341fe91a0720a23cbf46dcf5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 5212 bytes
font_01_sfnt_off0000f14d.bin
0988264d9d67ee4f2c0b26bb6c71eb862bcf471dad36a0f9e142dc904b2479af
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 10956 bytes