Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e85fb104a4ae2…

MALICIOUS

PDF

41.6 KB Created: 2020-11-02 18:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2267ccff10325cba8301599f3627666 SHA-1: 559778e50d0a725ece78ae688a008e1829686c04 SHA-256: 3d9e85fb104a4ae23077fb7fcb14d46acc68e89336c17cf1b51c6a89edd7a7e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent URL, 'https://ttraff.club/123?keyword=disciplines+of+a+godly+man+study+guide+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, reinforcing the intent to redirect users to potentially malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.club/123?keyword=disciplines+of+a+godly+man+study+guide+pdf
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f8fa399a66ee.pdf
    • https://vidigesiwixir.weebly.com/uploads/1/3/3/9/133997627/0cb2996c.pdf
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/neguja_finomurasug_vegitob_sawalodifif.pdf
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/a162bff8f0c62.pdf
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/6528c6d45b0.pdf
    • https://zebigogax.weebly.com/uploads/1/3/4/4/134459641/4674923.pdf
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/funiwomuperagaxidaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/efb02193-e9f0-40b0-ad9e-449d8823bfc8/trifold_futon_frame.pdf
    • https://uploads.strikinglycdn.com/files/6106afdc-3054-4d79-8ff2-7e309cd97408/60946165332.pdf
    • https://uploads.strikinglycdn.com/files/dd44137a-bf74-4c47-8f4c-899df24e0f54/vabalemivugezejo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006286.bin
624508ded4cf7e17f474d411effbdbc2149b6df0b5b8522e38f60413772a30a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5480 bytes
font_01_sfnt_off00007530.bin
56ae3450b1a55a2011e55611d16a5f333344695029b13fb479bb019582f8376f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 10788 bytes