Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7f13b332e85b64…

MALICIOUS

PDF

42.1 KB Created: 2020-10-31 04:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c479c609fc656ec891a7cd1c494d10d SHA-1: e6eb308cc0ed7a0a4448903f450f153629ca1fe5 SHA-256: de7f13b332e85b64227221da9c1a49f9c76df2ff976bb26e50535f44041c1d38
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Sheltie puppies for sale in nc' and embeds numerous links, including one pointing to known malicious redirector infrastructure at https://cctraff.ru/aws. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?keyword=sheltie+puppies+for+sale+in+nc In PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/6000709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_5f97d197629fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f8a10a022477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8c5d384b489.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/e3b4020b.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/4297649.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/9667682.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/kokis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f91f6b46bc20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f9caeed5de06.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/tutapaxi/87679716734.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/faladizegubepulutur.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/copper_peptide_serum_revolution.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/cheap_plasma_tv_stands.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/100_kelvin_para_fahrenheit.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/3487098143.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/senukaluborodo.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_off0000652a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 5208 bytes
SHA-256: 3a26b951da4c869aca03e2d151d71e9f4868aa71ad2796ed12e5f207e1cc3fa3
font_01_sfnt_off000076d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 10764 bytes
SHA-256: 6eb4e0d1a6011334ea8571886d99ad8fc2ebd01e64415e0ca4f6877eeb17ee8a

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