Malicious PDF — malware analysis report

Static analysis result for SHA-256 2761e3494aba1e69…

MALICIOUS

PDF

96.1 KB Created: 2020-11-20 09:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f7b1cbe97dc9a48cd8c8c7174d59ac SHA-1: 1177a8c900d1b4af2f7ca8440a3ec7b270f70f7e SHA-256: 2761e3494aba1e6953c8ef07ac14c9cf90c623b38d592a4213d5048aadffcc70
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, 'https://ggtraff.ru/strik?...', is confirmed as a malicious redirector. This suggests the document's primary purpose is to lure users to this URL, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=%25D8%25A8%25D9%258A%25D8%25A7%25D9%2586%25D8%25A7%25D8%25AA+%25D8%25A7%25D9%2584%25D8%25AA%25D8%25AF%25D9%2581%25D9%2582+%25D8%25A7%25D9%2584%25D9%2586%25D9%2582%25D8%25AF%25D9%258A+%25D9%2584%25D9%2584%25D8%25A3%25D8%25BA%25D8%25A8%25D9%258A%25D8%25A7%25D8%25A1
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5fa4a01252150.pdf
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fa72454703a4.pdf
    • https://cdn-cms.f-static.net/uploads/4448330/normal_5fb2ebdbdb7b8.pdf
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5f9c9a452bd87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5bf47bda-aff4-4051-a164-28ae66c7d9b6/xutupiriluju.pdf
    • https://s3.amazonaws.com/pasawexawinogad/epson_artisan_1430_inkjet_printer_for_sale.pdf
    • https://s3.amazonaws.com/jivala/zero_conditional_with_answers.pdf
    • https://s3.amazonaws.com/tosevud/mario_benedetti_poesia.pdf
    • https://uploads.strikinglycdn.com/files/1f3d4730-9506-4a18-b95d-9c3762180afa/97987895656.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000136bd.bin
225428c1fefb18a84c623288a53060c3953baafa4bef900c4e07bed8a1a2e5ab		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x136BD 33320 bytes
font_00_sfnt_off0000f298.bin
eeb5e31d71f00cead1fc940f0cd48c64d31cc2a9b3bda03c141aa0d4294f0e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 4068 bytes
font_01_sfnt_off00010075.bin
9dbbcb7596699e2c64796ace818babcca6e315fff9ae6611fabad248e01b3068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 7668 bytes
font_02_sfnt_off00011ad5.bin
326b2e2ba2bb5be1975d0d5c14307567f6c0fe815eb1087c055563200dd764f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 18168 bytes

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