Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3366ac8ce34137…

MALICIOUS

PDF

41.2 KB Created: 2020-11-02 11:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5a6ffd75c4b61e46ab514f72d12a4e43 SHA-1: d76a1185b0dec33a0c9dca5cb519245fbb0fd1dc SHA-256: 5f3366ac8ce34137085c290dff4143ba740612a1bc6433a69baff71664213cca
94 Risk Score

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://ttraff.ru/123?keyword=smetanina+olympic+winner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f97af86e9f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f8a5877633fd.pdfIn PDF document text
    • https://xumomeroruv.weebly.com/uploads/1/3/4/2/134266579/6135619.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/4331348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8721df6d136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f8907e5861c3.pdfIn PDF document text
    • https://sibojigejediwij.weebly.com/uploads/1/3/4/6/134606131/1374553.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/6d9bfcae3eb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2479/6829/files/observation_in_science_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/fexuvodilujemupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/roasted_ratatouille_cooks_illustrated.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0277/3671/files/9422628166.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_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 5200 bytes
SHA-256: 2a0417d945ee467bad8b16f7fd50d301f21e6d457eca808c8b85c81e0379565a
font_01_sfnt_off00007493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 10484 bytes
SHA-256: 4d3625aae3d353b195c7ce0c4568302e498a36f0c6b8ef10b93180bce2e3115a