Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cf91a10d9e4771…

MALICIOUS

PDF

37.9 KB Created: 2020-11-02 18:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5cd1298fa2c446651737054faa2f0e0e SHA-1: 0d04f570bff629bfe37602c680dc0520caaa9e69 SHA-256: 95cf91a10d9e4771a2e26bf2a50eb18607d27fda27f86efe453494ce0786d9d6
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/pify?keyword=kids+color+wheel+blank+printable` is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure.

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/pify?keyword=kids+color+wheel+blank+printable In PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/5544638.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/0fd84481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/bojedomabusanedosem.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/rumolowapamalikuroza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3154/1918/files/excel_search_worksheet_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ae8a1b-1f18-4937-9a94-389160b19d92/63943102794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c7feba-18ad-41fc-88f4-19e8e268c7e1/bmw_x5_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e950df62-1ffe-4aae-9b1f-fc480683a6a3/22774481937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/reforma_da_previdencia_2020_texto_aprovado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/country_karaoke_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/jikumadabojupabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b33e6e-6055-40da-94cb-7bfb0e8ad613/25740620032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0420/5503/files/39702226770.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/allen_bradley_5000_plc_training.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/95964209923.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_off000057bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57BD 5424 bytes
SHA-256: e75e554860002fb2deeb76a9817fa208236dc9e426fda53c2f4a5a019d4521ca
font_01_sfnt_off00006a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A33 9656 bytes
SHA-256: e27038c585312fbcd5c23c41b26289ae42d051e35e3e1bc5f6c3e49adcd2f208

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