Malicious PDF — malware analysis report

Static analysis result for SHA-256 c067ffe349967f5a…

MALICIOUS

PDF

67.7 KB Created: 2020-11-24 18:11:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 82afb120fef57aa403ef7bbfce36ddf9 SHA-1: 234f0c060479c90d8d09a630b1078ac64268ed36 SHA-256: c067ffe349967f5a517f50329e85c03fe0657a7058aa3639817b2c174792299c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This URL is likely used to host phishing content or distribute further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=ncert+science+textbook+answers+class+8 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5fb8c50d76965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f89dd3141c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5faefb39145e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f87850423fe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f8b27323488d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_5fab1281b2e2a.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/3fe85407-d95f-470b-ae7a-ef0d07ae28e5/helen_kellers_teacher_by_margaret_davidson.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/pobibifunaxuvesapenefog.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/monster_hunter_world_trainer_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/videoder_free_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cfba4b-1dcd-4664-8070-bbd7c09617a6/girl_baby_shower_cakes_floral.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/wallpaper_photo_hd_shayari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2620708-9b38-491c-888b-753c42d82c26/18171012590.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/83298969629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520e2f03-35ef-4048-a779-68d089bd6df5/belarus_tractor_manual_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/46750721926.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_off0000cbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 5320 bytes
SHA-256: c22638073e8847572e1f1d90749b2fd0b6f8d9584e50396d1230515f123ef0ef
font_01_sfnt_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 10492 bytes
SHA-256: 9091b52adfd0b1a47c516eca252f3910c50d4c976e726a49bbaf0bc6a6ffe23f

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