Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd17863c51b676a…

MALICIOUS

PDF

61.4 KB Created: 2020-12-20 06:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1894d522ec047a7f5bf338bdf04abc0 SHA-1: bf9c3c349db56d74940a04a2e569ce3aa66ed734 SHA-256: 1cd17863c51b676af68d5c62461160fbd4af3452514d851efe097f72798b71b6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, appears to be related to search terms, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=2008+troy+bilt+bronco+drive+belt+diagram
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5f9fb6e07d248.pdf
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5f9da2005315b.pdf
    • https://cdn-cms.f-static.net/uploads/4483855/normal_5faba7e96e7da.pdf
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5faae7cc62485.pdf
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fc1884c16a17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezejoputiwinu/47472402304.pdf
    • https://s3.amazonaws.com/kijelopazekune/business_process_management_books.pdf
    • https://s3.amazonaws.com/bezegoluzose/gi_bleed_transfusion_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/64858aad-9e9d-47d6-9a3a-5491b2d8c2d3/collins_black_feminist_thought_chapter_1_summary.pdf
    • https://s3.amazonaws.com/fejatepudopito/former_captain_of_sri_lanka_cricket_team.pdf
    • https://uploads.strikinglycdn.com/files/889dda27-137f-48e5-a33b-3744f5035bcb/50_shades_darker_download.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_off0000b198.bin
d6cc38bf7340120e5e35d314e432847de5766760a321e9c76ade5243bcf340d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB198 5756 bytes
font_01_sfnt_off0000c520.bin
16a1fe965c32f9d0840ea60a268c909dafbd2c68777da9daae94bd279376ed4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC520 11072 bytes

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