Malicious PDF — malware analysis report

Static analysis result for SHA-256 423db3816f1f386b…

MALICIOUS

PDF

73.4 KB Created: 2020-11-22 04:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 95d7153050f117cdb3a98ad595d3997f SHA-1: be955fde2dc97103bc2e0e8f531f2985e80c5b80 SHA-256: 423db3816f1f386bbb1f965d68df6d207a92dabb33dddd3bf9eac588ad223a69
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/123?utm_term=siesta+key+beach' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the PDF and the malicious URL suggest it is used as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=siesta+key+beach In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5fa699c07abd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f959ca5442da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5f9c178549dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5fac0c26eed42.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/02e7780d-ab00-4f0b-9e06-034a1e395527/68565493851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a64ff03-8599-42ef-b9de-db571d14e155/73275821365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e583092-6bf0-4517-9850-c35de112544f/joranefinoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47810718-6da0-48b0-aee7-297d9680af7f/new_employee_spotlight_word_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3e9430-e50e-4cb8-b96c-e270588c9c8c/928371159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bd8e6b-7f55-45bc-bbde-6a7a8b411319/61365669082.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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 5168 bytes
SHA-256: eccf52e3f1fe78d16f74322af6e4ea08baac149b4629b9f116d8d6a758bdbfbe
font_01_sfnt_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 10656 bytes
SHA-256: 560c3ae262680789a2c68432cde1bb21b8f1e949cb4cd8af88760f8c14f6e025