Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d9194fe91818d8…

MALICIOUS

PDF

35.5 KB Created: 2020-11-04 16:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4963672783d8d4dc7e817b455205a3a SHA-1: 2732b68992abf00508892e7d53b33d9381643ddd SHA-256: b2d9194fe91818d8b21637b81b8b2ad8bc90d6f784880ac3375a934e137d1fda
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.ru/123?keyword=high+school+christmas+door+decorating+ideas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f9a16444b20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f9bd32b19e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f9d96659f2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f913b27c4fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f920c883bf5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f90ff5ba0dd3.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/b223c230-07ce-4317-b29c-b04e3b5199c7/witaxowetodozafer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c8246f-0d3e-4905-b2ec-75103f73b972/my_name_is_inigo_montoya_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/apple_porter_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418d29fb-3727-4320-8835-332368382bc5/68488167402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277d197e-cb19-405b-9e3b-9d2c84ba6f8b/ninalifuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d5f3ba-340d-46e6-a957-404fafd231ca/pharmaceutical_calculations_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f9f35b-6722-4527-a52e-7d577247debf/94063302126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b494cbb0-3550-4964-aa12-4b0b2703c415/48638272213.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_off00004c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4E 5312 bytes
SHA-256: 1c1be62033dc68b9c085d9355588c68ed553c8201d46c89183232afcd5a9efd9
font_01_sfnt_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 10332 bytes
SHA-256: b98608f46deebe9cc1b14ac0ad589aa59c6a3b05e3cd67a3c6ffd197aadad6df