Malicious PDF — malware analysis report

Static analysis result for SHA-256 4562071760972b11…

MALICIOUS

PDF

35.5 KB Created: 2020-10-31 21:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a327a3fca7b37e9315d336c4bba4822 SHA-1: ddc42c002f0c57f5cbb4669db6a777b600d26682 SHA-256: 4562071760972b115013dc9d8ee9035cad7ed1de7a1b9c9b98506348a7f14ef5
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/123?keyword=golden+age+definition+synonym, is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting it is 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/123?keyword=golden+age+definition+synonym
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/9c61d878584d.pdf
    • https://dujizozobalosu.weebly.com/uploads/1/3/4/4/134470010/sozarebelemuk.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f892e01a2bbf.pdf
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8a4f08af7c6.pdf
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f872dc262cda.pdf
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f910f648fbba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leguvefu/59736513140.pdf
    • https://uploads.strikinglycdn.com/files/5a86bea0-f065-4ac9-bf28-ffc3894abf67/wagaresakasumivibo.pdf
    • https://uploads.strikinglycdn.com/files/1fae9474-5176-4e47-9144-9ccc422089b6/25475189853.pdf
    • https://uploads.strikinglycdn.com/files/f1466c19-2d25-4d11-9f4b-8ef03e60208a/25671783672.pdf
    • https://uploads.strikinglycdn.com/files/9fa2ef98-e71f-439a-8ae2-c8ba66c7ae4a/lokiwitanokisefevetawo.pdf
    • https://s3.amazonaws.com/luramamelolem/types_of_weathering_in_geography.pdf
    • https://uploads.strikinglycdn.com/files/ce4a6811-6596-4174-bebb-dc1951332410/torusuzimoxurimagexagaxi.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_off00004a68.bin
5e15e6751112a5f2d37d5f9f6387bf5d0076623059d5d74a218fcf73c93a2382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A68 5264 bytes
font_01_sfnt_off00005c54.bin
240f1149309ad94b990024de4cdafbdc14c6cb139f884684380712fe5a4d04bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 11076 bytes

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