Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed956c0fae836f26…

MALICIOUS

PDF

42.7 KB Created: 2020-11-01 23:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2a9e61f2dc00c6116b64b702ad9cd1e6 SHA-1: 58a8ac61493edb1340f16133d153442d0a6cb59d SHA-256: ed956c0fae836f264f4a800ac57994ec89f8e82d4808b78c4d0a548d46cf10a6
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector to known malicious infrastructure. The embedded URL, https://ttraff.ru/123?keyword=metric+units+chart+weight, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection.

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://ttraff.ru/123?keyword=metric+units+chart+weight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86f4b58bf8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f97787a72639.pdfIn PDF document text
    • https://kuzewejutoba.weebly.com/uploads/1/3/4/3/134398832/5765795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87514043189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8b2b9c59ae6.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9678319.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/d815fc03-adca-40e8-b598-5cd9b6fb5dd1/56058462592.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/87231998023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33735bed-8d5a-467c-881f-2a67b51f7a77/employee_warning_notice.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/90912089426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c928e938-beda-4240-b669-95b79e78164c/gta_v_lester_assassination_stock_mar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1023/4778/files/84932899199.pdfIn PDF document text
    • https://s3.amazonaws.com/gonavo/gizubibulone.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_off000069ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69ED 5124 bytes
SHA-256: cc875916e6f56cbb7ed157597a7921ca71fd9ec4447b30eb20456831df68a7cc
font_01_sfnt_off00007b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 10256 bytes
SHA-256: 522766eee069ee2ac6d037887eaf21c0b01d71ea341117e05397a8f6d2d67b15