Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75dedb0a13512f2…

MALICIOUS

PDF

43.6 KB Created: 2020-10-03 11:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40bb03066f6ef1069679cfb8875103f0 SHA-1: e2d776fe81489f9dc6b69b368632e872508cc410 SHA-256: b75dedb0a13512f2588f3c2f1c1125764578935972cfec042b99f910170e3ea2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body text, though partially garbled, includes the URL 'https://gettraff.ru/strik?keyword=i+am+a+rider+lamborghini+mp3+song+download', suggesting a lure to download potentially malicious content. The presence of a large number of external PDF links further indicates a link farm or redirection scheme designed to distribute malware or lead to phishing sites.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?keyword=i+am+a+rider+lamborghini+mp3+song+download In PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/28980204051.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/38452258094.pdfIn PDF document text
    • https://site-1042360.mozfiles.com/files/1042360/birigifi.pdfIn PDF document text
    • http://dodadefi.cake-angels.co.uk/uploads/1/3/0/8/130813132/89caf56676.pdfIn PDF document text
    • http://daxenim.brockpsycsite.com/uploads/1/3/1/6/131637896/ca97fdd00396e9.pdfIn PDF document text
    • http://files.discipleshipacademy.com/uploads/1/3/1/0/131069987/xajizemula.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/588f96e8-c4ac-4b4c-b9ee-84a2f2d16f68/71302302726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb94a46-7a44-4d6e-9736-c2708b53e151/89623513457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2c6283-c465-43f5-b169-2b97bd3d55ed/gatimidovorude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49610a7f-9c4a-4773-97bd-b7d937baf5b0/68725023033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43e6baf-f5e6-42a1-9052-a85fbc02e133/vedateloxejapim.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA8 5708 bytes
SHA-256: c5dc2fba500dc779a109be982b36dbbf0c5b7f048f0c58d506283830e5cd5427
font_01_sfnt_off00005de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 10484 bytes
SHA-256: 8c72f669a0b35904a80f74c4e17171f52dee9ac8dd821f0c293d54ea1c7fc274
font_02_sfnt_off000081e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed

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