Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7123f658391c27…

MALICIOUS

PDF

78.2 KB Created: 2020-11-11 00:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36d2dc1bd92e4c2ead81e7b88ecffe8d SHA-1: 1544a74b0d69552b52f8096bdf524bda8160fb79 SHA-256: 1d7123f658391c27f47d104108427b5e6b66d80b7c43b8bdf561611338d2a39e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?keyword=minecraft+team+extreme+crash'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=minecraft+team+extreme+crash
    • https://cdn-cms.f-static.net/uploads/4428061/normal_5fa36612d7273.pdf
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87107ac5a63.pdf
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8e94caa1656.pdf
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f91d69da2726.pdf
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5f9aef118ad4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40d46517-6ec0-4243-853b-187665ed09b9/mifuna.pdf
    • https://uploads.strikinglycdn.com/files/a9763180-d782-44a3-a49c-12894d70c3a3/google_classroom_student_login.pdf
    • https://uploads.strikinglycdn.com/files/b6a51d04-99e8-4352-9d0a-cb949d47ba6e/what_is_smartbyte_driver.pdf
    • https://uploads.strikinglycdn.com/files/629af1e0-8b36-4e4e-b825-0501d86d226b/95508635477.pdf
    • https://s3.amazonaws.com/divelikubapiwaj/87655232240.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e5.bin
fe2899032dd738cb0dc89f3156384c4e2cfc178c7d735e730831e97c2d6a27e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 5164 bytes
font_01_sfnt_off0000f85a.bin
0ff2b7b5382f860ed59654390c9276d7613963424d47275270d934d6a8553e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 16048 bytes

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