Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af85c2fc52e9962…

MALICIOUS

PDF

45.3 KB Created: 2020-11-05 00:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159fa71ceeb96f699bde62807369891e SHA-1: 9f300824ae6895fa1f5f5d192b5c4952182e1c22 SHA-256: 6af85c2fc52e99628a9d3e375f2d49213a9226ed7343e7796f9eee62e327f18c
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as search results for game cheats. The ML classifier strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of infection.

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://ggtraff.ru/123?keyword=fallout+shelter+cheats+xbox
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8b7896510ee.pdf
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f8a2aa79f626.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/ziropur.pdf
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/nupikupumuvi.pdf
    • https://xifamosavujefiv.weebly.com/uploads/1/3/4/4/134457952/2967d32cd1.pdf
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f91552bed5e8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b9ca6a68-0e2e-4cef-bd1a-f2766b2692fa/90167685781.pdf
    • https://uploads.strikinglycdn.com/files/38a6ece8-9d88-440d-ae1e-4d13a01bae25/41689960366.pdf
    • https://cdn.shopify.com/s/files/1/0501/4677/1125/files/rebajorotebepef.pdf
    • https://uploads.strikinglycdn.com/files/a6668397-130d-49e7-9e49-40b607891307/kikujiwizojukajofixi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000649e.bin
1679f95dab1110118cdfc92bbb14d1ac10b8f731db67a4cd1da8cf49e74befbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 4776 bytes
font_01_sfnt_off000074f7.bin
7b9c06c765904c80abf03a21dcbcb7c27c9343836ef8eec9d83878404f2b10af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 11016 bytes
font_02_sfnt_off00009a5d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5D 4324 bytes

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