Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2e8f9e4df7a8c9…

MALICIOUS

PDF

103.1 KB Created: 2020-11-02 05:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d3587687bbc8a9428457149bc51f8129 SHA-1: e3b0b480d21ccc186604f8b88f2dfc8fd255dd50 SHA-256: cf2e8f9e4df7a8c9349536fabee09556591cb7a2e12a315a81953fac048a9749
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is highly suspicious. The ML classifier also flagged this PDF with a very high probability of being malicious. The embedded URL is likely the primary mechanism for delivering a secondary payload or leading the user to a malicious site.

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=crossbow+crafting+recipe+ps4 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vukumesoj/tuguzonupokenibok.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/blairsville_saltsburg_school_district_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/kimawarow.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ziropafibepabumaj.pdfIn PDF document text
    • https://s3.amazonaws.com/legolikagamop/xanathars_guide_to_everything_samurai.pdfIn PDF document text
    • https://s3.amazonaws.com/banijugoniragom/criminal_minds_spencer_reid_in_jail.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/24015522011.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/purizo.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/92142696398.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/walenirubefetumebuxevus.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/juwetudad.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/18182299830.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14942 5284 bytes
SHA-256: 0b55b4a9de238fc3992b3b29aa57eef5443c2de961f22fca26ea7d72375c1d23
font_01_sfnt_off00015b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5D 11084 bytes
SHA-256: a9abc870481462fcaba91e26f84bdf94db35ce4690aaf4f58dc89f973d84f153
font_02_sfnt_off0001810d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1810D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3