Malicious PDF — malware analysis report

Static analysis result for SHA-256 795318d6f8a01c95…

MALICIOUS

PDF

39.5 KB Created: 2020-10-09 08:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a5b1093b32176f807bd4909e60579455 SHA-1: eb6cca5a808224ee9f101b900d8b83b8156cf58f SHA-256: 795318d6f8a01c95a216ad78da97657eeaf963bf48569512900a5af45c5831f2
102 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, which points to ggtraff.ru. This link is presented as a download button, attempting to lure the user into clicking it. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple embedded URLs suggests a downloader or redirection mechanism, likely leading to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bankersdaily+static+gk+pdf In PDF document text
    • http://files.itsnotaboutthesexmyass.com/uploads/1/3/2/6/132681293/e0dff5aa2aa47.pdfIn PDF document text
    • http://files.msmontagnon.com/uploads/1/3/0/7/130775126/56705d180f4c55.pdfIn PDF document text
    • http://zuxokod.photographersrendezvous.com/uploads/1/3/1/4/131483200/musivelam_xisowefube.pdfIn PDF document text
    • https://site-1040143.mozfiles.com/files/1040143/wekajux.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/gigudif.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/49539942165.pdfIn PDF document text
    • http://jazejux.destituteband.com/uploads/1/3/0/9/130970003/d10937ff51e0.pdfIn PDF document text
    • http://movoku.editheztilizta.com/uploads/1/3/1/6/131636744/xokovoguku.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/77c461cc-df9d-4e6c-a3a0-9dec066d4ff4/6734730565.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_off00005c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0D 5536 bytes
SHA-256: 755f95508b195c8db6a67ea7b90005b4e75149c9f691b83dafac783657f29609
font_01_sfnt_off00006f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 10304 bytes
SHA-256: 300070d0fd2d2dcde9a138803c24c459f866645ba65022998b0554f83461f441