Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f59f4d1187fb040…

MALICIOUS

PDF

90.1 KB Created: 2020-12-05 20:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3e6cb762e6e4c1dcd2614167272abd24 SHA-1: b0f6ed71d75e6d8d288d5d83a7357b131bfd08d4 SHA-256: 0f59f4d1187fb04001b4c718c39f5a5b3a3d650d8c64225c7bae258ba672fed1
154 Risk Score

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 'traffmen.ru'. This URL is identified as a known malicious redirector, suggesting the PDF's primary purpose is to lure users to this site. The ML classifier and ClamAV detection further confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URL strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=walther+ppk+7.65+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8fb24a343ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5fc2d2e175ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8e56bf5727c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fa44732c3ca8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivamubug/online_movie_ticket_booking_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/xewek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1262c084698658e5fcd88/t/5fc7b633bfb90028be5bb464/1606923828437/invaluable_experience_or_valuable_experience.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/kegateniwexuzegot.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/tabutoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13ea182-63a7-4b70-96f0-0029c7380ead/31189252791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f46085-a3d8-4b18-a0c2-7ce0332df004/2775796729.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10190403f5353fd9652f2/t/5fc8f0795b325f76422db7c2/1607004282465/square_payroll_quickbooks_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1858bf7cf8c75402f5531/t/5fcba80da0b42e3566aca36d/1607182349603/sweet_dreams_my_angel_in_spanish.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc543fd3dfdd95b60f1e399/t/5fc71db7c953717e09d1d56b/1606884791685/titomibakeses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73b8c9e-52e7-42fb-92f3-a69768692fe8/55745672529.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_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 5348 bytes
SHA-256: 4cf9dc671f68e6c575cc47d433b59596da146b1aacb823bb944d92c0c158202b
font_01_sfnt_off00012e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6F 14512 bytes
SHA-256: 1ca938790748e66a90a1ff241024949268fa98f301f71f324a9030c81f2e395c