Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9e1e68c1586b0c…

MALICIOUS

PDF

72.3 KB Created: 2020-11-27 10:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e4159f56a35c4013be1005fd2a1344eb SHA-1: 1207106b43041d374ffb3497fad12624bc1f84d1 SHA-256: be9e1e68c1586b0c4f1e5f7548f6121fcc8e756f9efbadb5a7bf56ea05f3ed93
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 indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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://traffmen.ru/strik?utm_term=spell+perfection+pathfinder In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5fab6948ef23a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fa870c2e1f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5fb56c6152aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fba76664d23b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5fbb2857c65b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494668/normal_5fb76d041d557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f953c41f40e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f880aacb13c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa59311e70d5.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/saziwijaxodav/aaja_piya_aayi_bahar_dj_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e5d7e7-67e0-49a8-879c-cce2fc8955b8/14697703604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c9f49d-0836-4aab-a8fa-c094b1d8bd41/testmax_nutrition_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/ncert_biology_book_class_12.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_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 5168 bytes
SHA-256: 32026c66303600c06252eb098673ba62d822e32329a1d0e319ae3b93b897313e
font_01_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 13640 bytes
SHA-256: a3827375a56ea9b76fbf8352d3e0e400ff065c3b1f9d27d658416c76ca38fcfb

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