Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfa88fab19ccefa…

MALICIOUS

PDF

58.3 KB Created: 2021-01-01 08:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3df4668a9389a31cc51ee986b3f76be SHA-1: 86deabd81ca900226515f98d5bd068849441524c SHA-256: 1cfa88fab19ccefa5f4f6896cd5a674ed29a3ee704ea687dbcab18ccff7093bb
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ggtraff.ru', which is used to deliver a payload related to 'droid- cpc 1. 1. 01 apk download'. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9633

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=droid-+cpc+1.+1.+01+apk+download
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fd0b76e04452.pdf
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5fa1eaa4a84b7.pdf
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce4e378eb73.pdf
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/juxikotimutepapiso.pdf
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5fd8e3c560f88.pdf
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/todevupiduzobo.pdf
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fbeb58712351.pdf
    • https://uploads.strikinglycdn.com/files/52ead622-8162-44f5-94c4-f58d6a617840/tovowomazuvexukuxok.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/rekuji.pdf
    • https://s3.amazonaws.com/zuxadol/45425926676.pdf
    • https://uploads.strikinglycdn.com/files/b2c3014c-4462-4dba-b5d4-39bbdf9ce136/subjective_relativism_pros_and_cons.pdf
    • https://s3.amazonaws.com/zuwimadaneb/zovipe.pdf
    • https://uploads.strikinglycdn.com/files/93ac1365-c551-45c8-a2fe-1614122db279/la_fitness_swimming_pool.pdf

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