Malicious PDF — malware analysis report

Static analysis result for SHA-256 99242788184512e5…

MALICIOUS

PDF

44.6 KB Created: 2020-10-06 15:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: db5286603bfc035d175ce09856a7def2 SHA-1: 772c9e4b1617c6badd58de101be92e319642ec8c SHA-256: 99242788184512e586c942d06e1204a305e2b6fd5a72216574ec119dfa0f266e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/strik?keyword=47+meters+down+streaming+vf+voirfilm', is presented within the document body, suggesting a lure to a fake streaming site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary malicious function appears to be redirecting the user to a harmful external resource.

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=47+meters+down+streaming+vf+voirfilm In PDF document text
    • http://files.bcipse-gateways.org/uploads/1/3/1/3/131378814/ketidifivoxav.pdfIn PDF document text
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.pdfIn PDF document text
    • http://fogirizax.mitchadvent.com/uploads/1/3/1/6/131637046/tajujisokifa_gojedomobeke.pdfIn PDF document text
    • http://mawoke.danthecopywriter.com/uploads/1/3/1/4/131437425/4978969.pdfIn PDF document text
    • http://files.masasailing.org/uploads/1/3/1/4/131437680/29c14a.pdfIn PDF document text
    • http://files.draustinsaysso.com/uploads/1/3/1/3/131383630/fisid.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/23fe212c-a017-4f0c-b9ab-cd7ad838e0dc/70100632638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73643f8a-d618-423d-9731-6581e100b1bc/palekogagefoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c8c9f6-b6c2-42e8-bbfc-6b732512ef0c/72856094564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debfcc23-fb78-4080-b376-30e53fa7e41c/92849472681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078585a9-4f20-45e8-901b-1e82d4dcfa76/41892891297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c65569-cba3-46ba-b2a8-767df728e45e/66105255950.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_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 5452 bytes
SHA-256: a6a84b8b239dcfe76f5b9e3d26166cac3a8dcfef5916d107fed7dee95cc44348
font_01_sfnt_off0000837c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 10072 bytes
SHA-256: 1b8731db1059004c1aa02326e3007f919e382cd41c2f6bcb2f2f70ff8228a4fe

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