Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ef6a5643d3b790…

MALICIOUS

PDF

59.2 KB Created: 2020-11-12 22:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6533fad74979abfb792fdfcbbbf49914 SHA-1: b39b42945ec7a7c8c6ca29e40663ee865f013068 SHA-256: 33ef6a5643d3b79067e2e646954694a0da044534064df70fd3d09b70db41fc7f
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 URL is embedded within the document and is likely intended to lead the user to a malicious site. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=changing+linear+equations+to+standard+form+worksheet In PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/9258de.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/b48f48.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/98e2e754-4265-45b9-9b3e-9cb6ed6a6653/truth_honor_and_integrity_show.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/pentium_2020m_processor.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/optical_isomerism_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae03024-e362-471a-a138-e105610edeed/welifafopaxogaweberidebid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17c0e0c-a706-420a-9377-cffa35b00578/suxepin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e998f126-72fb-4c0e-9cf7-993c617fcf82/all_trig_identities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7c28f5-3685-4327-95a2-45d462cc9d3d/jenukusope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b7e2f6-04da-4d4e-9380-77fc412fa917/lubifewizasizazoxejali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e44f9af-1eb8-403a-83c9-fb33f1789c14/susavexubunetukon.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_off0000ace5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE5 5508 bytes
SHA-256: f5545f0cdccb4f6ec0c0aef90d831c1a91d02e80bac144a364f13f8542e9c020
font_01_sfnt_off0000bf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7A 9784 bytes
SHA-256: 5b8f4c059fcd97b9eeb1147f5d0b5e9f8e6a0c05a962a03f293ead575ecb9888

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