Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e24806cdfe3de9e…

MALICIOUS

PDF

42.3 KB Created: 2020-11-05 02:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09361263d5adc55b27ffd1ebd8d65f36 SHA-1: db0b958ba7a583086be140066796d84044620f3d SHA-256: 4e24806cdfe3de9e0506fe9a9435af80758db017358f8cdc3ddd8576bcebf725
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://cctraff.ru/wb?keyword=nucleuscoop%20ps4%20controller, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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/wb?keyword=nucleuscoop%20ps4%20controller In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_5f9901d11524f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8bb14c8c7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8c9f2ea20ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5fa30eb5ae83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f8b70571293c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2426f1ca-6a18-4d7b-bfed-452ad4bdbd9c/potenil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d478ca-bcf9-49f5-a57a-a82d7bfdb3d9/xexap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e61bc0-c2ab-41a3-abf4-955758b480dc/35909950616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e68df1-8510-4882-876f-f20072be2bda/81979124799.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/24174624217.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 4776 bytes
SHA-256: 53abec7d4d51169bf351fd5eb1a67f03ce5883b7eb59d6b454cf89d3cda11ad7
font_01_sfnt_off00006ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED 1964 bytes
SHA-256: 7c4880219e9625d2a4e9dd9baa4d28a857a57833d139bcdeda5c52338edb6e7f
font_02_sfnt_off000076f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 11068 bytes
SHA-256: 207d86dddbcb50cacf61b0c9bca4d8b75c42c852685fec5ea02192b7dcc67942