Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ad892d5f8746fe…

MALICIOUS

PDF

40.5 KB Created: 2020-10-07 19:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3d89e1dca9c67cb3b012e584f7c69080 SHA-1: a7f3fc599e89f059c18c6d67b94da2a5e7c90e96 SHA-256: 51ad892d5f8746fe50f730258f20854a8be72d06968f339b53c216527e495bdd
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, specifically `https://cctraff.ru/pify?keyword=fast+food+persuasive+speech+topics`. This indicates the document is designed to redirect users to potentially harmful content or malware. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/pify?keyword=fast+food+persuasive+speech+topics In PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/35727939772.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/93140932898.pdfIn PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/zapovufofulin.pdfIn PDF document text
    • https://site-1040888.mozfiles.com/files/1040888/sanajuredapiratupaxali.pdfIn PDF document text
    • http://files.mcmjanitorial.com/uploads/1/3/1/4/131406356/5b2cce2e6e7ba.pdfIn PDF document text
    • https://site-1039952.mozfiles.com/files/1039952/98341800585.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/potufi.pdfIn PDF document text
    • https://site-1045328.mozfiles.com/files/1045328/zuzalurikewot.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/wotubizevozisoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 5224 bytes
SHA-256: b9ebfcd0f34cad88047aa699572421b1bdd22e0a5c20716ab0d5ad49a23418e3
font_01_sfnt_off000072c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 10260 bytes
SHA-256: d8907822b4fab33069c37bfff2777cf0fb9827ef5f7dad3312245f744adcf221

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