Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e468cc87f4918b1…

MALICIOUS

PDF

67.4 KB Created: 2020-11-03 06:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 22b661499ec7be22c54b82c3c74af84a SHA-1: 9d7bdee54139c8ad955e46cabbbc40b44ff0711a SHA-256: 9e468cc87f4918b1bada4f4d3d6cac0790a92009c888d81a1775b75c0ca9f6e1
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful website. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious intent.

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://cctraff.ru/strik?keyword=types+of+faerie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f926127a33c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f9a4e74a49c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5f94f77837cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f89c6311bc18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f9714d99aefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f92392a10d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5f9d3bbfc2af0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f90c9a834bab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5fa0b5f4b6015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fa01f9833daf.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/b44b0463-accc-4263-934c-b2beb7862c3e/nescafe_dolce_gusto_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bazubeluxagabaxamis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291e148b-ed76-4c21-a267-1e14a62efc7a/65269689600.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/ielts_speaking_cue_cards_with_possible_answers_download_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/metuwapozomas.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/wabugabeb.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_off0000cc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0F 4916 bytes
SHA-256: e514191e8f86093da5ed71e23d4e80e2053f8c8e7351be45f6a8bf16230db071
font_01_sfnt_off0000dce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE0 10572 bytes
SHA-256: b233459f0a42d478b726d41424c26aa028891dbdb73ebb17c1427e81a0e0d7f9

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