Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e822601c2b667b…

MALICIOUS

PDF

78.1 KB Created: 2020-11-14 20:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e026d43b8f21dfc67f72809cfab991b3 SHA-1: 1b7249dfa0940de024ba4559a918b9f81d0de769 SHA-256: 55e822601c2b667b1e0d398ecc15effb19d501e775d40b660fb5378c391c8ed5
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL `https://traffine.ru/strik?utm_term=giran+my+hero+academia` is the primary indicator of malicious intent. The PDF structure and content, though partially obfuscated, do not contain executable scripts but rely on the embedded link for payload delivery, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffine.ru/strik?utm_term=giran+my+hero+academia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fab610801abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f91244b9031c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f92304f56efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5faf627782bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f91b8e4e3c18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/cooling_tower_calculation_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/33521117006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd853b10-0680-4bd2-aeac-dbc3cdd6f474/jusaso.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/patriot_nurse_age.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/16667001468.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/zegujivifadanofobu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 9408 bytes
SHA-256: 55aadb17e206ab55666793f8cc2441b33c246fa9938e4424bc79761c651240b6
font_01_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 5100 bytes
SHA-256: 2f30678def2460500e3460d09ec2c1bfcc608a24eaa448e1efa03be6a501c1c1
font_02_sfnt_off000107cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 10500 bytes
SHA-256: 519aee03cf356d7a619cabc9b4d46be8d44679158adc7eb79f2275224612f7b7

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