Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd7e87c12fb732f…

MALICIOUS

PDF

71.2 KB Created: 2020-11-24 08:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06c7c44fcb2e46c1d02ebeb4d90b2e9 SHA-1: 1b8233a4d52517f126a9f321cf46f631778cf613 SHA-256: 2dd7e87c12fb732f04fa13d0e425bd38a6439db69eb0aaed0829bbf66c054d74
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is suspicious and likely used for redirection or phishing. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a potentially harmful external resource.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=dehydration+of+cyclohexanol+to+form+cyclohexene
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fb4de68ee868.pdf
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f8ab9dc705af.pdf
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5f9a7d5c8fb6b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dfce1e35-1293-4e61-ac5a-fffd4f782d80/gilaveteju.pdf
    • https://uploads.strikinglycdn.com/files/6a4a064f-ed53-4638-95bf-6440a80bcc0d/nbc_sports_apk.pdf
    • https://uploads.strikinglycdn.com/files/1de47bd4-aeb0-4ef8-8fb8-65cc694ee028/vefefulur.pdf
    • https://uploads.strikinglycdn.com/files/2cd62ace-56ba-4b53-8f9e-6d0ed92771d9/26864917364.pdf
    • https://s3.amazonaws.com/vebenok/bekhayali_song_mr_jatt_free.pdf
    • https://uploads.strikinglycdn.com/files/87181e82-d923-467a-b25e-f301ebd280c7/momudibokafaz.pdf
    • https://uploads.strikinglycdn.com/files/64cec301-0210-4a38-8934-2c974dc08a58/96885949518.pdf
    • https://uploads.strikinglycdn.com/files/bceb6b45-4d0c-4752-a6d1-841577214b07/barakofi.pdf
    • https://uploads.strikinglycdn.com/files/8186520b-e8d6-4e6d-a550-abc6ad2ac74a/82739104069.pdf
    • https://s3.amazonaws.com/libeganot/poronigefulir.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d778.bin
65357b4966f43f2cc371c8758f2f233ba106bf11951d0a14aecbe6e257afeb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD778 5252 bytes
font_01_sfnt_off0000e942.bin
b64cb794183b68191314f98e65b17bf76edc6a29a42e99406f3dd4d3776968c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 11672 bytes

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