Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11f03cb27dc54c3…

MALICIOUS

PDF

74.5 KB Created: 2020-12-18 00:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ff12e154205fc7aea690830b9df8be9 SHA-1: 03105624de62f49baa97838e4c6d19751b200fde SHA-256: e11f03cb27dc54c36d2d401b0c9f8004ca663484981bf64c1aab2a3e6428302d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high ML score. The embedded URL, https://gettraff.ru/123?utm_term=which+or+what+time, is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/123?utm_term=which+or+what+time In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5fb4adadca41f.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7702792.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/xetobuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5fb91dd97185d.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/jinotugiwomo/xofora.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/webudedar.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/jitujedurafewari.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/jejisiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c906999-f8fb-477c-8f74-963923156fe7/78705692573.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/70653827012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd97e676-a736-4701-84fd-428a60a7d7f2/52891669106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6835be0-ff00-4dfd-8c2c-94c80169ac0a/87374999441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce8ba2f-45aa-41c6-adfd-2341267fba05/68793545862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3878acf9-f318-4e64-b986-cb39b229e1fa/gulat.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 6324 bytes
SHA-256: ea9e583e3043d6989e23999886db1ecc5fc7e39faf4ff6978f6b8ffefbc12701
font_01_sfnt_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 4936 bytes
SHA-256: 5bf0f366b7112b60b7c25c226977e4658afff90ab734bcaeec94811355c9ca61
font_02_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 2944 bytes
SHA-256: 0aa83e099ba7b6abfc433245d32bcfd4b4c3f928dcf6c287bdfbb1e92b756da5
font_03_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 10576 bytes
SHA-256: 47151c630935a5a3cfb5c77a7857e31befd257d273a4652e3d2cbec2632b7e5b

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