Malicious PDF — malware analysis report

Static analysis result for SHA-256 c852875c4d07ca5e…

MALICIOUS

PDF

42.2 KB Created: 2020-11-01 18:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d4ea0699e37285cfccbbf3cb1f416812 SHA-1: 0194d3e1d58e6d1fd427e93073924d7782cfda80 SHA-256: c852875c4d07ca5eafdb2d8699f3aaf506ba698ff2ae0e34d4cb081657a09091
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/123?keyword=xmovies8+tv+2017'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, and the embedded URL is the most actionable IOC.

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.com/123?keyword=xmovies8+tv+2017 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f97e1b7971b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f9ed407330cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/78534396407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/25324665303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8a91ff-6b3c-4d46-82d3-0f8b967efe24/numijuxavalu.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/a_kingdom_strange.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/guxaniwezogozumeroluma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1859/8558/files/website_to_download_free_ebooks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6298/3363/files/10148009688.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/30496327158.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wilimirifewapewitobabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e1d93f-3ab9-4772-b589-f093f1378d79/zepowubilogebaxuleso.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_off0000665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 5132 bytes
SHA-256: ba93e5261615152b66fa244088b3c53e2031dacffaccabfb074d800337b3a150
font_01_sfnt_off000077db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 10916 bytes
SHA-256: bc786ae2a71a2f5eec97ff9301cf0a749119d1e0b64920efb9e6427044fbc859