Malicious PDF — malware analysis report

Static analysis result for SHA-256 385e648b6c974a5b…

MALICIOUS

PDF

65.1 KB Created: 2021-01-02 21:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dac99b9d26493fa4ce6d90036f2f3053 SHA-1: 7fce7eb23bd46a515c24dbfa0547b18134137188 SHA-256: 385e648b6c974a5bc8bda0cd7fa3dceae7f5766171ffec5b8e6f276ad85ce695
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=melissa+and+doug+kitchen+accessories+uk'. The document body, though heavily obfuscated, appears to mimic a search result for 'Melissa and doug kitchen accessories uk', suggesting a phishing or scam lure. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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://gettraff.ru/123?utm_term=melissa+and+doug+kitchen+accessories+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5faec8c543d54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fdf4f3c32009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc9a5465f551.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/mexesazaxasa/dazagolas.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/anthropometrics_and_ergonomics.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/betsey_johnson_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/gefopivavuri.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/nujegefemuri.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/46697028836.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/glosario_administracion_de_empresas.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/sibajenefatadowu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/sodixugoberimo.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/political_cartoon_practice_worksheet_answers.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_off0000c30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30F 5268 bytes
SHA-256: 29360bdc60ee323ceac0ba4406d5e605598bdf6c487f9aec8dcc50f2ff82abf8
font_01_sfnt_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 10180 bytes
SHA-256: 2c01bf2fb1f98614f1cef5a5c702f88a6a35d31bb8f541b4e72e9daa1a8a1b85

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