Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc442306896ad824…

MALICIOUS

PDF

29.7 KB Created: 2020-10-30 06:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 02f2ec5ea2a28ea480a04f387a41b9fa SHA-1: 11db20d5cc09027c86bab01db817207c4ba97d1d SHA-256: dc442306896ad82472f99ce33db1afad006dc573078b1a4e287f4538a0e6cd71
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=proportional+tables+worksheet'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or further malware delivery.

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://gettraff.ru/aws?keyword=proportional+tables+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f9b7316a003a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5f97956d8b44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9a94a567c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f8b6e1f2db8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8eec43d3937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f876b931b261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87460d625ae.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/058bf5e7-7c5b-4227-b067-e120136809e8/warokemokolifunakasid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a987e9-a816-4b1e-97fc-1eb2c25b7ad7/21646095171.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/bubenisudujutaxokawimowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/sovolategikomexef.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_off00003c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C6A 5204 bytes
SHA-256: 53ab837557fe5ce9473d0d0c37721a946b07de6db1b4200214b8102e8fb8f976
font_01_sfnt_off00004e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1C 8332 bytes
SHA-256: 020b2c60417c8afa8205ea85c0d0d9127891b74f861bf2cac8600dee8b25e52f