Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd9288cac00665b…

MALICIOUS

PDF

40.9 KB Created: 2020-11-03 08:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61d5877a64d5cb846ee99d9ef2780173 SHA-1: 90853d3af24b104c5ce787196b437338facdeba9 SHA-256: 4fd9288cac00665b697c3c39da787bf0a855d7e1640e1bd25a4790a1ea6584a0
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://ggtraff.ru/aws?keyword=star+ruler+2+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5f9e209099d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f871c2d9ba09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5fa0e0165231f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f92afa068a5e.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/1/0486/4573/4568/files/33323041438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e10bf5-49fb-45a5-a5c8-8bc34fca5392/guworozijoxig.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/venovezanatodogakuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/agujero_negro_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/12086003593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/multiplying_and_dividing_rational_exponents_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5612f5-9985-4ec8-a04e-27b29e4bef5d/fejetabadofuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0683/5869/files/gowezarorirafowekarajape.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/made_in_mexico_cast_updates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cd52c2-e9a1-4d12-8bae-debe94dbf4c0/52625561873.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_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 5052 bytes
SHA-256: a09a2bfb2b39503d4ef7120fc9aeb755044a753309bc88b170c67c993c48f5f2
font_01_sfnt_off00007454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 10184 bytes
SHA-256: 86429b333ca2f5786f9c7df0c1ffa25cbc3cb9662dcac4f64ad7c1004e54e167