Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9392d8df9e9ed6…

MALICIOUS

PDF

54.1 KB Created: 2020-11-03 20:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cdc38530fcf9c7c8c8a55f5d33339ac0 SHA-1: b3244ce4692ace8d9c8f29df9c88cb585d788d15 SHA-256: 2c9392d8df9e9ed657258fdfdad6cba5b2e8fd2fff01b82e78fd35328b529192
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL, https://ggtraff.ru/aws?keyword=subjective+relativism+theory, is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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/aws?keyword=subjective+relativism+theory In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5fa1a71ed888f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5f9f928f8197b.pdfIn PDF document text
    • https://zirovosenes.weebly.com/uploads/1/3/4/3/134316706/zubusi.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/26b76863-906e-4212-89c9-1e3327ce4696/tojilafudowi.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/jpeg_to_excel_sheet_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/1602014689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6065497-50a3-43b2-bd55-a276a9be60d6/foxuzibesod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec679850-4b80-4d4c-9799-5218f324e2ef/94300923771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67ed400-3534-4f17-8c0e-246f177ff0de/burenofa.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/pidedapubujiwuzil.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/438407673.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/fau_basketball_team_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb1dc3a-f340-40a7-bb9d-056b45c4d20c/lepaseburikabopovokutav.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/cheap_toupees_for_black_men.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_off000095aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AA 5520 bytes
SHA-256: 8ade08908b96bfa617da3b08c0b426eaf613c907ccbc5731ab4ec2fd35678fdc
font_01_sfnt_off0000a851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA851 10356 bytes
SHA-256: 22fa5a27cddcf9d2cee9cf6094de85dedb1e1b2b432744f84429bffc3f8dff35