Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ba78dfb6c9f36f…

MALICIOUS

PDF

71.0 KB Created: 2020-12-18 16:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f5f3915ecd4c8675318b8bb8abddad80 SHA-1: b5b26c7607360f636a2d962455d2439e2009d2d2 SHA-256: 38ba78dfb6c9f36f4917f71419bf1ed6db5b09789bb7599aee6eac93f96877ce
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=where+was+mighty+ducks+filmed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f886c0ea56e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fifuto/optavia_healthy_fats_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c819e0f5-f23f-480e-93ff-4ff0a613346c/epson_artisan_725_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/puxisovitonapiben.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2af36df132613bbc92a03/t/5fc81aa8e21c7c679ad687b9/1606949545774/73938460738.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c384116eb00e3c6d5904/t/5fd1de49fec2791e3108de19/1607589449586/command_and_conquer_red_alert_remastered_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/vurasinufojuvupenuvadinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7a8609-12c1-4664-a31c-8c7c2b9a0e3c/70494893028.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/musewixeruzariwudaluri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf719ea95a9497c03ff81/t/5fd75e645488895576c9c8f6/1607949927934/background_music_for_documentaries_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce26cecc0d2519aa9f8c7d/t/5fd6960c313c42342b95882a/1607898637109/aiou_1424_solved_assignment_autumn_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/venn_diagram_template.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_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 5704 bytes
SHA-256: ce8af628f6c375af2925f6a70da16727a792dd280f84cda5a145e955989793d9
font_01_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 10596 bytes
SHA-256: 0aacd4e8dee6b515f2cde584aab8460c7d03f38c1a8d3482d9e9612dcaa4757f

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