Malicious PDF — malware analysis report

Static analysis result for SHA-256 143fe83e61ef33c9…

MALICIOUS

PDF

41.4 KB Created: 2020-11-02 13:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 263d5a381ee2dc41f26b56cc97e79d6a SHA-1: 534d87fa1345423d71db4466ec9e4554286abab0 SHA-256: 143fe83e61ef33c94abb33547d007cb174d9e548533028325c51c7e99d76a892
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://gettraff.ru/strik?keyword=pokemon+tcg+online+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f93ea5290d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f953896411a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f88f38d2de5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f95d188a7c3a.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/631a2765-04fe-43c6-9b66-71571047871e/92965286033.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/fibuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb999962-5dd7-4a53-9175-bca3dc1c491b/viserupulobexaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/fosifugasataratuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013804fa-1724-4651-bb65-288d741f8b70/74906772003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ac350a-8bf0-47db-b88a-b661053f8e9c/diwizexidepuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be637a57-d4ae-423c-bd78-57c2064248af/99954043921.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/wojarimizexajuzevetiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184b191d-9a9a-4a11-86c0-e1da7ebf12c4/duvojapokosoronurabifi.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_off00005ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF1 5044 bytes
SHA-256: f11803d37d184892247d8d2dc469b67c4bcddf196384e53096c70cd8f16cd764
font_01_sfnt_off00007116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 12416 bytes
SHA-256: 984b3c3616e7d0e766c9ef60505b2427794f47c0c63b2104671b3b144743888c