Malicious PDF — malware analysis report

Static analysis result for SHA-256 523cf941c99da9bd…

MALICIOUS

PDF

79.0 KB Created: 2020-11-03 17:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d96af14f62203b9f756cdc42152417f0 SHA-1: 233178d02e1354f33d362ea15c82c37eec28a792 SHA-256: 523cf941c99da9bd5875d77d04890ca049b6bf8fdb444f86fac71ddba3fa2822
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/strik?keyword=cyrenaica+basin+libya, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt.

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://ggtraff.ru/strik?keyword=cyrenaica+basin+libya In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8e179d19c6e.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/a9bc83721a16f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f95f79719487.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/5201cba7-699f-4fa2-a839-b2a6a254fb8e/63949888296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa87b1b0-9b5a-4d8b-9f1a-b57c0d1dcf7b/tojexanotalokijanage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4a0ecb-95b5-4e4d-9839-1a55a03b59e9/forge_of_empires_guild_treasury.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/autocad_2013_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3086/2753/files/smartstandard_barn_door_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/35176746083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2183f4-edb0-43ee-a62c-59dfb4713347/19550174216.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_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 4940 bytes
SHA-256: c1942788011013529b59e44973e112a73916b7ad4fa39fcb25b4a05fe9715f2f
font_01_sfnt_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 11476 bytes
SHA-256: f034c73fc75a6d1730c7142c9b6fed60fb8164ea0c64cfdf311294122089eb86