Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66d3c87c787d7fc…

MALICIOUS

PDF

83.2 KB Created: 2020-11-24 09:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3e5afec80b7a681c613038326ecaa2ef SHA-1: 76fe8014e13a0a8e09969002f0f60b434422806b SHA-256: c66d3c87c787d7fcc0308f7794499e5915acc1d20b639f45261793dcfc2079ba
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including critical alerts for linking to a malicious redirector and a high ML score. The embedded URL, 'https://gettraff.ru/strik?utm_term=les+nombres+relatifs+exercices', is identified as a malicious redirector, suggesting the document's primary purpose is to redirect users to a harmful site. While no scripts were explicitly extracted, the nature of the PDF and the redirector link strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?utm_term=les+nombres+relatifs+exercices In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fb4cd8563b9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_5f9de1ab6fa6c.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/rakad.pdfIn PDF document text
    • https://kamejufozafa.weebly.com/uploads/1/3/4/8/134891268/4153105.pdfIn PDF document text
    • https://zefutijokizire.weebly.com/uploads/1/3/4/8/134868110/timelodexom.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/cc38d230.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/accbc22d-5271-494b-a476-865a069fa60d/wuwiferujele.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/5332697639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfad24a4-ad4e-4af0-99fe-5790944d8afa/dovikunokimogejoxibew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbcaf2d-3239-4384-8932-61a63e981828/tech_trash_rust.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c873a28d-1a06-44a9-a45e-3398195cf354/52711283118.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/21455820689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae6d710-356c-4394-9cb8-b671cb15730e/libro_de_educacion_fisica_1_secundar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878ab9cc-637b-4a8d-9079-b468a30c412c/77735283244.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A0 9212 bytes
SHA-256: 1062987f5734d614aeb1512b9537a32a790a250a45fe9f2c3abd5e99183f0fd1
font_01_sfnt_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5176 bytes
SHA-256: 3ce8d45e3b5c6eaef56e21ebc38158d6a3c0a5ccac544a0c5fe651540af8ec4f
font_02_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 12076 bytes
SHA-256: 902a7678eef955e663521da4a5cb6ad79271b584b3615e3dcaba63dea3381ab0
font_03_sfnt_off00012913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12913 16100 bytes
SHA-256: c3461001ca888bed6954970c14d027cf202d908e5c0b8e175f896e5a236b6086