Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9ef29fd6df2a4a…

MALICIOUS

PDF

31.7 KB Created: 2020-11-03 18:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5139535a74c02ffc40820c1f73b2f75f SHA-1: 985f51e0dd34601cf578ea325eaee9f265a80e55 SHA-256: ce9ef29fd6df2a4a1013ba5ae10716bcad7c5c91a1b105700176b999d85ffddf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, 'https://ggtraff.ru/strik?keyword=typical+gamer+merch', is identified as a malicious redirector. This suggests the document is designed to direct users to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ggtraff.ru/strik?keyword=typical+gamer+merch In PDF document text
    • https://jijidiwudop.weebly.com/uploads/1/3/4/4/134481930/f55dd8b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f9ebca956c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f874d9911cda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5f9d2c7b6ac4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f90cc94b82e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f9e6c1daa97f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f9e5a952c43c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef489a02-cbc0-4f5f-b1cb-2bb675f421d0/4236336594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb7404f-f6dd-4904-9d63-d0ac328f4b5a/dololakagemop.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/80188136067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00845d22-4922-49b3-80b4-deae216069e6/58595600173.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF4 5220 bytes
SHA-256: 4351bbcdcf6227c9afebb0c95bcb8a57348342e9b74cb5117d6bd3e814c2a8cb
font_01_sfnt_off00005197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5197 9684 bytes
SHA-256: 104069f30b510b735fe8f5dc9489ee02b2682a21a62c79c4f418cf97c8bc845a

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