Malicious PDF — malware analysis report

Static analysis result for SHA-256 1603f45f37665ae0…

MALICIOUS

PDF

70.1 KB Created: 2020-11-29 12:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f1817a3202efa3fd7770065cf74ddb22 SHA-1: 89d23dedb14a4c0bb173dc09685aae8fc27c715c SHA-256: 1603f45f37665ae0001cc4041946093229f2605bbf2fc72278696cbcc9417004
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 to 'traffine.ru'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely intended to lure the user to a phishing site or download further malicious content.

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=perfect+flame+grill+5+burner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f975ade1b7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fab27879c0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_5fbcf3284f6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5f95017b2a584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5fbbb1a911ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f875f23c3213.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74edd766-c4a6-460d-8dc2-16696a1475e3/dujunodufomituwos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51099862-08b8-4c92-93ca-9401b4355f48/63628952769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53b35ad-7262-4cfc-9886-f5e26051bc91/junasofevagavajunosudeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9e9ecc-2594-4eac-812e-0345d777e3ba/bemutivezilegidoluvin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90126bd3-595d-497b-8b6b-165c17891ef9/19059333068.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/timofuwejolije.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/paguwaxufizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784e8976-65c2-4a9e-95e0-f490be44bfd3/9868356148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae51db04-6848-45a1-ba07-07b4edcc05ff/fullmetal_alchemist_manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ace3e0-ea6d-4715-8ef8-e5a7db46c231/47648172187.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_off0000d336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 5288 bytes
SHA-256: 3a70af81f996e5f240f608c57229a6acc73751b3da8ae8f4fd8f69aeb78964bf
font_01_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 11388 bytes
SHA-256: 9e398db943bc3d6825451ded0e4343bb0ef182e03ae57dddbe14024b1f6c26ae

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