Malicious PDF — malware analysis report

Static analysis result for SHA-256 623e947c1b8a1ecf…

MALICIOUS

PDF

50.6 KB Created: 2020-11-24 05:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66bb2783e88f2747d5552cc299cb0ddd SHA-1: 5161c21fab2474317472cb190b12d6f2aa2c1189 SHA-256: 623e947c1b8a1ecf1af8e9fd25e768d4e552918d6be953da784259751e3f17fb
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is an image-only lure designed to trick users into clicking a link. It contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This infrastructure is likely used to deliver a secondary payload or lead the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6064

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 50 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://ggtraff.ru/aws?utm_term=electronics+books+free
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f8ebc969f9e5.pdf
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/bejafen.pdf
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5f8dd352eda8d.pdf
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fab06105652c.pdf
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fa7ed63d0c40.pdf
    • https://juregirezixo.weebly.com/uploads/1/3/4/4/134401856/mufewa-fokagez.pdf
    • https://uploads.strikinglycdn.com/files/732f21bf-b0de-4741-ab1f-6dd826ad0eff/74896640036.pdf
    • https://uploads.strikinglycdn.com/files/55d5a462-3db7-4c5c-b375-1e4e7cb85e3a/44115797134.pdf
    • https://s3.amazonaws.com/zuxadol/navy_aptitude_test_questions.pdf
    • https://uploads.strikinglycdn.com/files/eee97398-8291-482c-93e5-b4466920aa64/building_spelling_skills_grade_3_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/2d44ca0c-0ee9-409a-81da-ad3124da10c1/55041913239.pdf

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