Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b1c409d32644d5…

MALICIOUS

PDF

71.4 KB Created: 2020-12-24 10:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 14493e5c90c0358d2e7a99b7a4405df0 SHA-1: 16908c4105c7a4eb01d7e859be803244eb291069 SHA-256: c9b1c409d32644d537c054dfeedcdb3e5c2b7c6cb05f710297a0fd2a7ae2e302
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 'traffine.ru'. ML classification and ClamAV also flagged this file as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site for further malicious activity, such as phishing or malware delivery.

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://traffine.ru/strik?utm_term=orange+video+game+character+with+long+nose In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f9d953b7a015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5fa705ee5768a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367911/normal_5fc9ae7f6beac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_5fadfc0957772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fbe901c2a8d2.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/ninazarila/birthday_video_maker_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/75428283157.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/newetaruk.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/fivodimetatuko.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/ascorbic_acid_usp_monograph.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/scholastic_aptitude_test_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/36307730630.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/80199624548.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/making_a_personal_budget_spreadsheet.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_off0000d9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 5532 bytes
SHA-256: db8354f994e57b1226dc131f700d4125bf455db26f3946fc12b61d837b4032ae
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 10464 bytes
SHA-256: 090d26079167ad54be1bf2e46571633bca55d8203b12bf5967682ab8102b865f

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