Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ea204d40a0ed7c…

MALICIOUS

PDF

37.0 KB Created: 2020-11-05 09:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d50b3dcaa77d10575831fc355aecb1a3 SHA-1: 1d509b876ce35819ec147b80027bc03839e93133 SHA-256: c2ea204d40a0ed7c56ba3f0924a173b110603cb7f6ff4585e715b7b79f4689c0
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?keyword=nhl+ticket+exchange+bruins In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f91ac413946f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_5fa3731ac02be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f883e928fb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f95b1be6c8cc.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/vavapekadoliti/baviwezotusizeso.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/analytical_biochemistry_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/navsup_p_409_milstrip_desk_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/48136093339.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/seriesbiblicas_net_apocalipsis_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/luvomitexotub.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/web_development_with_javaserver_pages.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_off00004e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E31 5304 bytes
SHA-256: 97a92801ab508aa43b5027c2e32ee84b34a3ea8e70f4402e8c0aeff758bbfbed
font_01_sfnt_off0000603c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603C 11884 bytes
SHA-256: 1f31b56ee7ab875f33ce343e362fee389b6a1c48018e0cc20d8dd9e28e48e3f6

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