Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce0474f6e38b891…

MALICIOUS

PDF

33.2 KB Created: 2020-10-06 17:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0517332c15460a4c7d1b71c3b968773f SHA-1: e658100c257b42385aa02c2fb64f396c9bcea7c0 SHA-256: 7ce0474f6e38b891476b4221b46fff3d41631caae6a203695f41e4dd15149ea1
182 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://ggtraff.ru/strik?keyword=el+peque%25C3%25B1o+nicolas+resumen+por, which is likely used to lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=el+peque%25C3%25B1o+nicolas+resumen+por In PDF document text
    • https://site-1037868.mozfiles.com/files/1037868/35197841129.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/julanizufona.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/65116693501.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/panutubixeresazes.pdfIn PDF document text
    • http://files.hosannachurch.us/uploads/1/3/2/8/132814024/vunud-liwatu-naberubon.pdfIn PDF document text
    • http://misep.becomebettertv.com/uploads/1/3/0/7/130739777/6097027.pdfIn PDF document text
    • http://files.swanleeartdesign.com/uploads/1/3/1/3/131384573/1891305.pdfIn PDF document text
    • http://files.greggmozgala.com/uploads/1/3/1/0/131070723/gapibitigozatoz.pdfIn PDF document text
    • https://site-1041937.mozfiles.com/files/1041937/29335072334.pdfIn PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/mageje.pdfIn PDF document text
    • https://site-1043258.mozfiles.com/files/1043258/gisufoketu.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/wusikulunedake.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/14540824415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73984974-133d-4e45-915e-9abd80201e29/66421626602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2af29f7-04ee-4c9a-948d-1b3f67c459bb/tidunugorepixan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c96196-0709-43e4-bd5c-a902e5c815d8/rosidufofumolegexadowun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bfe239-c4af-4362-91f1-0c804dbd709c/45360574720.pdfIn PDF document text