Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8304557f51239d…

MALICIOUS

PDF

98.8 KB Created: 2020-12-20 10:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6f0cd6802d6019393a2872093ae6315b SHA-1: 839e1e800543e2eec6eaaf6832d68dd738cccc84 SHA-256: dc8304557f51239d19e7a128c1fc63e2a3219d691e3c5e45953bc0dd0533ad4c
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/strik?utm_term=partes+del+pie+en+espa%25C3%25B1ol, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious link strongly suggest a phishing or malware delivery attempt, aligning with the 'Pdf.Phishing.Trojan' ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=partes+del+pie+en+espa%25C3%25B1ol In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/books_by_kevin_trudeau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f7de97-45dc-4a45-bc9e-d26644ac88b6/xijijavelizedimalalu.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/45709942286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0a569e-b751-42f4-84f9-f6c21810ceb8/reglas_para_asignar_numero_de_oxidac.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcea222f04d935f4b60d0b8/t/5fd6b03d034a586a4f502b12/1607905341949/greensleeves_violin_and_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215a0607-5054-48b8-b555-5aa52bffbd78/proceso_de_seleccion_de_personal_heineken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47d1f31-cc2f-427d-8823-9d4bf42b45ef/65446545245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f4e6be-3937-4362-b3c7-90a3e360e146/98749154010.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b9cab79f442f22a6952/t/5fc256f7145a8629dcfca46f/1606571768133/somos_el_pueblo_de_dios_acordes_piano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e144ab79f442f2430649/t/5fd74551ffab5d3c56161c04/1607943511459/suraw.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/rukogorari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236d9fba-b2a4-4518-ba80-fc91d569df63/milisubitewajubidixusir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a0a9579eee3ae06ee35c/t/5fc94e73bcf66c653891d1bf/1607028341039/miranda_kerr_2020_interview.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_off0001453e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453E 5164 bytes
SHA-256: e44b4a923347b87b3edffc9af36afe2765c4afe86b8547d0979b74afd09cd320
font_01_sfnt_off00015697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15697 11676 bytes
SHA-256: 1243408d43aba993799a7ac86624e29c1640ebf60b1eb8cc401147f68f350767

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