Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f89f1785ee8599c…

MALICIOUS

PDF

100.2 KB Created: 2020-12-07 16:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68d8615f6bfa003a7026ba19e9805e10 SHA-1: bee1be837af739572c5822e89423bbc2719a26c2 SHA-256: 6f89f1785ee8599c8cb89d28b7712ee1a79fa21109e8da2571abe0f85917df45
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=machines+balance+lever+science+olympiad+video+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5fad95d70c3ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fb69cbfcc015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fc6859ed576b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5fc9036a3f538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472776/normal_5fcbd7c117ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5fba16d678cde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_5f9cc6760b741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_5fb28923f08bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_5fba9a6622879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f93d3d52a715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5fa73053594e6.pdfIn 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://uploads.strikinglycdn.com/files/f15b6d4f-d1ee-434e-9f3f-72ac1319645e/lofafelijafuzoreno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c052c4-ce81-424b-b279-bd7a5910d153/jean_klein_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e35ab2-3026-4c07-8d31-0e9f923466b1/zemuwebadidoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212caff6-e445-46b2-b0dc-e480f20f5658/the_fix_comic_cancelled.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_off00013abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABC 5504 bytes
SHA-256: b0e6dac6e5292949ca89ebb4520faa994cd00a78581a9e028ab204bfd0f9b8a8
font_01_sfnt_off00014d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D34 11688 bytes
SHA-256: c255463a42225b27b1e1452ddd1dc682f8af96c70ef5d2099492311fb049ad61
font_02_sfnt_off000174ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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