Malicious PDF — malware analysis report

Static analysis result for SHA-256 d586d6e3deb4af55…

MALICIOUS

PDF

39.3 KB Created: 2020-10-31 04:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 279045be1f3aa4c2b0c9f745734f7cd5 SHA-1: d1c93f7077f41d45b3988208446926a9643df076 SHA-256: d586d6e3deb4af5521968413d90af98d2756122b1c475abce46b2e72788448d3
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=nrcs+design+standards In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f9252735f9b1.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/4f71e497-413c-42d2-b058-620cb592cdcc/57968291661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a4b121-3ee3-4887-98db-6aea5edc36bb/36290627507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5714/4230/files/unblock_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/ring_size_guide_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a5e78b-8e29-4c9b-9251-2839494789fe/nudoraxobagidut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092a9765-9fcb-45fb-8740-fc21d4ba8127/meno_male_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/95555172989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a32e55-fe01-4429-9743-aee2eb07265f/topen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2697/1286/files/wupigitepuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728b0e3c-14c2-402a-bea7-de3e34d27bf7/14256272788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d142068-4d49-42c5-9da5-612025d2d503/ruruxobakamosivudisozex.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_off00005ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 5044 bytes
SHA-256: 1a02fa717921c00e80d3e4b832c7e543db7a8151dfe44845fa8b2514de532190
font_01_sfnt_off00006cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 10820 bytes
SHA-256: c7c9691bfa6720963970f21ed25a40e8f5d7f6ccea39369d73676322d2482d26