Malicious PDF — malware analysis report

Static analysis result for SHA-256 15be1cb613de4200…

MALICIOUS

PDF

79.3 KB Created: 2020-11-17 22:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 487bab8d7bd5802a01b9189583fc6f9b SHA-1: f0597d4082444a4ce1f88fadcf6c0db2fcaa1cf2 SHA-256: 15be1cb613de4200100f6145dd1520d2aa74c4ff35b9de5db819a2424d0549b4
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, ggtraff.ru. This indicates an attempt to direct the user to a malicious site, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=mens+leather+harness+ebay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f93f14333dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f90fb96e379e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_5fa3ee5c8fe57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f90020a60fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5f9f6f1c7edf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_5f9ac4e0d6df6.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/d73623d4-a543-497e-b77c-384e767c51dc/ching_building_construction_illustra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4aa058-725f-48c7-90e8-9e95ee0304be/72352108607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56759a5d-2db0-4ff2-b431-59304ce19be7/5376732372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70877802-38c9-4095-bd05-fb95b2411ddd/derek_rake_sonic_seduction_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a28f8e-f1ea-406b-b9d6-a00f64d64110/57226358044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a93ea6-4305-4a3b-bdb6-23edfcc21a2c/mckamey_manor_waiver_list.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_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 5020 bytes
SHA-256: 8b991524090ef05fa4ebbb9875374cdcfd1abd08d43869fb3d145f39fb830739
font_01_sfnt_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 10316 bytes
SHA-256: bbf3847c8d83e7a4743758dab332b1d9b8adff11ff626d8acb4ef8afa0ade6cd

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