Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c20acffe4a431b…

MALICIOUS

PDF

45.4 KB Created: 2020-11-05 14:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 686e9c59be3893e084dd6b3dc6a07596 SHA-1: bebfb7c2be351b71a85b5f1d169ead5e220118dc SHA-256: d9c20acffe4a431b99d47fdb947b6fa4faaf1c8a14aaa1dae590672056ed8b6b
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?keyword=number+games+for+toddlers+and+kids In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5f93a666e6d68.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/vevapisor-migevukow-pimofafajak.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/8c72260938b01c.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/d94197ee-65d7-4554-9a9a-0851d7781292/pakovomitexiveter.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/guzeferenoporilulejapaxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf252cf-e718-4d10-ab77-1973688e23dc/96363039804.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/feet_in_triangle_pose.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/muwalapuxubib.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/demographic_information_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/39460949820.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/fanufumonagupitirosowit.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_off000072c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 5400 bytes
SHA-256: 210f067b5ce4fa719683ede91a778b26e3d43bf1d9f1c24e8c5c12fad1921a1d
font_01_sfnt_off0000850e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 10460 bytes
SHA-256: fb27724c8d22794bb8d1d190d2b5e993bf4f5c1f221e6627519a0a8096af17eb

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