Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1fcb50a4142f51…

MALICIOUS

PDF

41.6 KB Created: 2020-10-31 16:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b8dbf2f2a3e18f9536c2d6f3bcc5d18e SHA-1: 1955f33d29dcd275de84f2d70980e5a571cc6745 SHA-256: af1fcb50a4142f51ba50ce4b127c19d31775c27b38c1d65fb0abb18172d90816
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://cctraff.ru/123?keyword=god+of+snow+in+hindu+mythology', is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious link suggest an attempt to lure the user to a harmful site, likely for further exploitation or credential harvesting.

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://cctraff.ru/123?keyword=god+of+snow+in+hindu+mythology In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8c96f0ed975.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/gakaxurekusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8731de6e800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8866125c4c6.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/82f92799-3ec6-4f57-b895-871112c44823/gazizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84544900-08bb-42d5-a987-7304ba0f5c04/gta_san_andreas_real_life_2_mod_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03985124-8200-46df-a961-7444d68ec386/7625551292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41847572-b01c-49da-914e-574f4547a7ed/singer_ultralock_14u32_serger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd2cf5d-3203-4374-a38e-d234090c3f60/13629713644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f888c40-6e08-48f9-96eb-60e4440ce281/tirokineradasafux.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_off00006538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 5240 bytes
SHA-256: b61e21f26228dbd4fbd088ecb607a1e4b83d9ccf89a4d26d6dbd4a79d7325950
font_01_sfnt_off0000770a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10472 bytes
SHA-256: 1431ea8ea61d96c619b85c5f8cf2450c5a983241350d7b1078bbacd08a62b3ea