Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa7d63bace2a2fb…

MALICIOUS

PDF

61.8 KB Created: 2020-12-23 14:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 255124832494cf9d2c5c0f5d32822b65 SHA-1: 74977df0845ba88bed63ad9eae73abba9a866022 SHA-256: 9aa7d63bace2a2fb2121b39b289a23d6550a58befd6747db4a087e07f3aad8af
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/123?utm_term=lazy+susan+bearing'. This URL is known to lead to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware distribution attempt, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=lazy+susan+bearing In PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5fe2c18671961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd994c18d6e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fd3cb3bba3af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_5fb490c96bade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5faf6302caeb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5fa1ddc2d63ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fd7da2f12804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcf0b666bbba.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/6112a44a-c325-4065-af13-fd9449b0469e/76399382665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11de0da-d350-4808-8741-ca1320cf15b6/emperors_new_groove_pacha_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf560f9-c7c7-4836-b1d0-5127da52046d/ie_virgen_de_las_nieves.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/fuwodikepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b501729-99b9-4c85-a2ce-559cf94ca2a9/53425871636.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/96399258672.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/audible_app_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a07ffa9-b6b7-4274-ac81-afb9e7e78f0f/pizasud.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/54551572573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1807c5f6-823f-4144-a49e-d54a3965ecea/fbla_competitive_events_categories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff809670-8d1a-4fca-8ab1-de1ed8ab5b58/electron_configuration_and_quantum_numbers_worksheet_with_answers.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_off0000b884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB884 5052 bytes
SHA-256: 4fb52b178619fd3c656bb05ad852acb0e603423f36a5a7254607f31e40656637
font_01_sfnt_off0000c9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 9420 bytes
SHA-256: f46f9b532d45a605224a210d097de2d24cb35226b32185569d8b25cabbf83ad2

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