Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efa066172d33765…

MALICIOUS

PDF

16.0 KB Created: 2020-11-02 22:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 356ff046baf7c7cee837cb199a267916 SHA-1: 79517b08550cd25d17f8eb5fc2e1a2a2b9cb4f4e SHA-256: 2efa066172d337651bbdd2810ce9c606fa14272742979e7bfcb992502a63ec9b
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing attacks, designed to trick users into clicking a link. The embedded URL, https://cctraff.ru/strik?keyword=coordinating+conjunctions+worksheets+3rd, is flagged as a malicious redirector, indicating the document's intent to lead the user to harmful content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 16 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cctraff.ru/strik?keyword=coordinating+conjunctions+worksheets+3rd
    • https://cdn-cms.f-static.net/uploads/4422147/normal_5f9d8ce461266.pdf
    • https://cdn-cms.f-static.net/uploads/4414336/normal_5f949431d863c.pdf
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/3183504.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/ruremijofuxugejoronigona.pdf
    • https://uploads.strikinglycdn.com/files/a8a99ae4-0172-48ac-b4d9-0a973828b1c2/zegininolos.pdf
    • https://uploads.strikinglycdn.com/files/f230a8d1-e22d-4dc6-9d27-586f305c0bb7/rusch_baby_food_processor_manual.pdf
    • https://s3.amazonaws.com/felasorarabipis/76121825524.pdf
    • https://s3.amazonaws.com/takateg/wavemizowotosafitebe.pdf
    • https://uploads.strikinglycdn.com/files/2de12283-4586-406f-869d-034eebc4f643/35883380279.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/fovukomikufode.pdf
    • https://uploads.strikinglycdn.com/files/154d6374-90be-482b-88ab-95d97e2e7a27/reviews_on_bio_tech_pro.pdf
    • https://s3.amazonaws.com/jewizopukuni/usmc_brown_belt_syllabus.pdf
    • https://s3.amazonaws.com/turip/81231535867.pdf
    • https://uploads.strikinglycdn.com/files/48e5322b-92de-4d6f-875a-a9c580d315c4/lecture_analytique_gargantua_chapitre_21.pdf
    • https://s3.amazonaws.com/salosibejodod/12944698254.pdf