Malicious PDF — malware analysis report

Static analysis result for SHA-256 770347e9f620e10d…

MALICIOUS

PDF

71.8 KB Created: 2020-12-18 13:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2e97e06a5a2b945cbc9a8d5f5990cf4 SHA-1: 11c127a35356eca321c06bc9c8948b2eaa387485 SHA-256: 770347e9f620e10d5ae5a39414d97658e8feefb22b5a0c66a44f0e5f7862a329
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=lead+lag+compensator+theory+pdf'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=lead+lag+compensator+theory+pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f991b5c168b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47044a97-9b16-47d8-b99e-40fab552c2bc/xopofebove.pdf
    • https://s3.amazonaws.com/vutame/bexokudivirog.pdf
    • https://uploads.strikinglycdn.com/files/3ccde793-b8b1-4c4a-94ed-64b5fb03b156/bemolufuluro.pdf
    • https://uploads.strikinglycdn.com/files/28e208b4-9893-4434-90de-2894c4f6caeb/41537446544.pdf
    • https://s3.amazonaws.com/leteraxewe/guwatovoboxiwagugo.pdf
    • https://s3.amazonaws.com/zalomi/brat_diet_patient_education.pdf
    • https://s3.amazonaws.com/betefowubevat/as_vesta_was_descending_form.pdf
    • https://uploads.strikinglycdn.com/files/906a99b3-bbb8-4502-b349-8e49194ceba3/mass_effect_soldier_guide.pdf
    • https://s3.amazonaws.com/gudukupir/avast_free_terbaru_full_version.pdf
    • https://uploads.strikinglycdn.com/files/04fa7721-6468-4644-81e7-5a5c350bfae8/serusalojon.pdf
    • https://s3.amazonaws.com/xewamejixolefaj/22219759013.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin
c691e97b5cb5a46feadb9b849d6707867db81e1ca556aacd402c77589485b6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 5612 bytes
font_01_sfnt_off0000ecc9.bin
ed32f7d17a3ec186ebf016f32b31cb979e889d20d606ca326e915af900a7b1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 11164 bytes

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