Malicious PDF — malware analysis report

Static analysis result for SHA-256 7664620574169411…

MALICIOUS

PDF

44.8 KB Created: 2020-10-03 01:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24901984126dd266970e7a60e387fce6 SHA-1: 5663335df50326735e9116a9c1eeacf863787e4f SHA-256: 7664620574169411e730071c35f3997eb2fd00d7c1c412f3b78a896013abea59
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL is designed to trick the user into downloading a malicious file by offering a free PDF. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=the+untethered+soul+the+journey+beyond+yourself+free+pdf In PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/21286714635.pdfIn PDF document text
    • https://site-1039503.mozfiles.com/files/1039503/26388833805.pdfIn PDF document text
    • https://site-1042442.mozfiles.com/files/1042442/palefemujef.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/68453842035.pdfIn PDF document text
    • https://site-1041591.mozfiles.com/files/1041591/40524730632.pdfIn PDF document text
    • https://site-1037103.mozfiles.com/files/1037103/pemepipi.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/c844f38b-8a9d-4705-9b87-7e4ee0aea159/furisexami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1d5932-e061-4d6a-9ac2-a908ae003e92/28926192223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c63c813-711b-4cc6-bb26-568e28484655/35319515335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76416150-76cb-4e17-a0bb-b4a46c02bcdf/65523416879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb4569b-0b2d-4981-83ed-2bde7736e7d5/toxobatuweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b9d2cb-a8a0-479e-90e4-b210c914cf32/44275350945.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_off00007017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7017 5188 bytes
SHA-256: 90440e3c3ed6e0c8f585e6a70c4b3c4fc31642084a5f45405723ac596ff5f7c7
font_01_sfnt_off000081ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 10600 bytes
SHA-256: be7e8ff67e0d1d92ff2291025cf6d006ea267cd5070748dd33be05a264eb3ebb