Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d58ed7a44364772…

MALICIOUS

PDF

66.5 KB Created: 2020-11-24 06:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d510b42bcbda8b9059a39038c8b099e6 SHA-1: 63f851906d7ca20ccb46f0463cf9de65577cdd91 SHA-256: 9d58ed7a443647726b245637c2524ed79bfdc7afef54d7c5cd56cf3d54aab69e
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, specifically 'https://traffmen.ru/123?utm_term=mla+format+letter+template'. Heuristics indicate this is a malicious redirector and a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to an 'MLA format letter template'. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a phishing 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://traffmen.ru/123?utm_term=mla+format+letter+template
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fa1b905dacf7.pdf
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f9fa10a5d227.pdf
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5f9bc63cf209f.pdf
    • https://cdn-cms.f-static.net/uploads/4461484/normal_5fa28d62f0a77.pdf
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5faef9222bf23.pdf
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f92070ea65e1.pdf
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5f8b74dfd9cc2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dedinavesute/tungsten_guide_rod_for_g42_review.pdf
    • https://s3.amazonaws.com/baxekojojexusol/active_transport_of_glucose.pdf
    • https://uploads.strikinglycdn.com/files/98f3e9fc-3ea0-46cd-ba0c-94c145745df0/modern_combat_6_apk.pdf
    • https://uploads.strikinglycdn.com/files/216f93d0-daf3-4892-a1a0-2dc4556f4cd4/97290723142.pdf
    • https://s3.amazonaws.com/xuzed/delta_hurricane_update_path.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_off0000c9b8.bin
7704abf7f88f42b4150022e3ed3c74988c1e13f5f360c324fd359d417d013e5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B8 4876 bytes
font_01_sfnt_off0000da43.bin
d1911c61b32be19f1e6e6c5aa80d9bb39e3ac6e3656b51519968bae907dee774
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 10256 bytes