Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddfcf26ed7aa902…

MALICIOUS

PDF

64.5 KB Created: 2020-12-02 06:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a9f2893f08d83f896caaec19277b11 SHA-1: 76ecaea22c8ebe3955f344db93d6d795446d2e69 SHA-256: 2ddfcf26ed7aa90289211ab09f5f82367ad3493270fdb1f89756f2933af50bd6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to 'trafffe.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL is the primary threat.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=sonance+vp66r+specs
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fa6d9799317d.pdf
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5f9e906034f75.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5fab16da1bd65.pdf
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fa12f4f36be0.pdf
    • https://cdn-cms.f-static.net/uploads/4419410/normal_5fa08c4cad347.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/727ac6d5-81ff-48d2-8c69-8364a961b7cc/67866106002.pdf
    • https://s3.amazonaws.com/kavitokolezub/xiwugifaseseviruxavunes.pdf
    • https://s3.amazonaws.com/kigavanus/free_letterhead_templates_microsoft_word.pdf
    • https://static1.squarespace.com/static/5fc0dda511f6a41984857aa8/t/5fc1f3fc4e98326c02565ff7/1606546429206/lurozefozezuzi.pdf
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc272a3fa04221c716eb7e7/1606578853078/5339154791.pdf
    • https://uploads.strikinglycdn.com/files/30ab46b7-43f5-4688-90be-30957a4c054e/71238726314.pdf
    • https://uploads.strikinglycdn.com/files/b2d88d71-ba24-441f-80a3-07d43312e12a/wileyplus_chapter_15_solutions.pdf
    • https://uploads.strikinglycdn.com/files/932f0ccd-bff1-4ab6-b6ea-2bfc00978e55/need_for_speed_world_offline_download_free.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_off0000c14a.bin
822638f55e2972344a479b2c06cb23ccc6a5ea769aa66e8a808b31bcda9d10fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC14A 5212 bytes
font_01_sfnt_off0000d312.bin
992507df66a6d37baa4c28dfc9d9303394e9a56407fe2c3cc82aad565cb72549
pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 10216 bytes