Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afe30447be0c849…

MALICIOUS

PDF

50.9 KB Created: 2020-11-01 13:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c1e2c428bf367b5f80501e67335bc11 SHA-1: 15f63412ee39c2f9b4cc314a893faba63c467de1 SHA-256: 4afe30447be0c849b7d056b1bed762641f41c4e72bd03852b65a9f04d751b785
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://ttraff.cc/123?keyword=taegukgi+bbq+san+diego In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5f9d87ffab536.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8571898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87422e28af5.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/79a8bb18-82de-4bd6-9372-dbdb1b080a4a/lidevaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0840/7703/files/sligh_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a539961e-1049-4763-a441-39dde382542f/35576980870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9042/0932/files/1069820976.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/72827722228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf2c33d-0f59-4bb0-9edc-786c9f5612cd/57079330068.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_off0000875c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 5144 bytes
SHA-256: 9fd62ffd677c50ffffa7d6c3d2eadeff9919e341ff9f353584b3fed94cb9174d
font_01_sfnt_off000098e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E8 11792 bytes
SHA-256: efcf6f17abdd3f3dd84423014917302653f8588b16c0020bbffe9b09934f77f0

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