Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cbe3eda8ddee45…

MALICIOUS

PDF

66.6 KB Created: 2021-01-08 14:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d8da040644e2557a3d795cea510087b8 SHA-1: e98560cdbed41e15c8d33694122e340c0aeb5b38 SHA-256: b1cbe3eda8ddee45e28e49b31ffb746dcdf66f8e82515d2e945db46d8dd3d4fe
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link and a machine learning classifier. The embedded links, particularly the one pointing to 'gettraff.ru', are indicative of phishing or malicious redirection attempts. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=crazy+creek+chair+near+me In PDF document text
    • https://terunutu.weebly.com/uploads/1/3/5/3/135319236/1773549.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/a1jf5ie/furniture_stores_hubbard_oh.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/IheVlgi/xesagirozuxuraxi.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/xupeje_pabibifiseved_lozinonapekenu.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/33a4bb43-5da1-4cd3-8892-4659ace4fa20/50726953982.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/asiento_de_ajuste_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f81c2c8-7f47-4b0b-84ad-8c5c83a15cf6/rorumunixegugobeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bc5619-00a4-4b9f-89c0-a317fcfff672/another_word_for_necessary_equipment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9244fd3-ea47-4c6e-811e-57db37c59fb9/sunokifolekoxibapiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/fukaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f93575-37a4-4e96-b922-e18cdfd3365c/14235688920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6adfa6-bfcb-4ccf-ad2b-784d38d5d287/63636413552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34026378-0e2a-4b5e-913e-16ca390356fb/47687922370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fe7314-188f-4d6f-9588-626b919f23b9/libro_del_maestro_desafios_matematic.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_off0000c864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC864 4948 bytes
SHA-256: 0e7fa813814ceb61d7af5d0985673b6f338b80d17a873c029c6c3500f9a3abe3
font_01_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 10528 bytes
SHA-256: b8e0275964f499f4c196a80d922a85c451cf131a980dce5f10f45646b7cd141e

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