Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3fd208317c3c70…

MALICIOUS

PDF

42.4 KB Created: 2020-10-31 14:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c811140567d90be24bc7759fef6f7df5 SHA-1: d28dda9c167a99493f2a024a4905c80cb0aa09d4 SHA-256: bd3fd208317c3c708c0a1624334bef02babf79b8e3fb612a7ccdc6b239598d03
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.link/123?keyword=school+district+93+salaries In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f927140b7f97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7006/0213/files/gekasokabanolezofake.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/how_to_set_default_printer_in_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/35592745131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f05a941-8e0f-4c73-a347-e56ade3a060c/titinazowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/4926964849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ed9179-065a-43eb-b266-22107410c29d/25876813908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279f451b-d5c8-4457-86e9-54435bae748f/73470776368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa43e64-6b32-4550-bab5-91f24b7c62e0/52417570892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9137/1196/files/free_brush_calligraphy_practice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff09a540-ab3c-44e3-9684-059e4e6ce4bc/probability_igcse_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/50712536583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0198/6202/files/85693725088.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_off000064f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 5448 bytes
SHA-256: 2a886c118721ce2c19047157496108cba9dfafa59194bbf381a7b23cd1f10993
font_01_sfnt_off00007761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 11076 bytes
SHA-256: 63147821b7605bcfa307180c87b19dddd969560fb4675780f16824455d8f30c2