Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f7d0bd166647a3…

MALICIOUS

PDF

46.4 KB Created: 2020-11-08 02:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 60f3dda4790dd70a43f572820decc523 SHA-1: b3021a412ceb42fbf83b3d9739f2eea8004aef2d SHA-256: d3f7d0bd166647a37af94cba7414b27ebd18c79de27a7916dc916e7d54b9efdf
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://cctraff.ru/123?keyword=mod+apk+simpsons+tapped+out In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f90aad42d0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f937ba21a93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8724f73c729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5fa25bb874d9b.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/fasanag/60032985716.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/ruxuduwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/this_love_maroon_5_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba4c284-7e19-4ec6-b60c-fdc583fc6fd3/40668538790.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/alessandra_hazard_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4e32f7-1488-4699-a86e-b1204b5de22b/47429222702.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/calculus_of_variations_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/4532984367.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/91974736576.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39957542364.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/73363677834.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_off0000777b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 5048 bytes
SHA-256: 24593a91495d83802eea1d23a4e5421e4da87235e5b30a265c0d30921d36f5d5
font_01_sfnt_off000088a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 10512 bytes
SHA-256: 630e7007bbff8bf89c183e87343b3be558a616e45a40258ea8e32e6e85e59339