Malicious PDF — malware analysis report

Static analysis result for SHA-256 d840b054b90a5dda…

MALICIOUS

PDF

60.1 KB Created: 2020-11-01 19:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 186d1f612054a91a4bfe19f84079417b SHA-1: b7d81ae3bb86719a7684b29250d7c6ce42d456cb SHA-256: d840b054b90a5ddae8ded46b6371158ef3c1dab501cb2b79953aaa8237526fbb
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/123?keyword=diego+rivera+paintings+1937, is the primary indicator of malicious intent. Although no scripts were extracted, the presence of a malicious redirector URL strongly suggests an attempt to lure the user to a harmful site, likely as part of a phishing or malware distribution campaign.

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/123?keyword=diego+rivera+paintings+1937 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8b73a6e6e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f92535e8bded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5f992abd3a433.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/dusubonifu/timurawuta.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/character_map_romeo_and_juliet.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/aiag_ppap_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/hanuman_chalisa_lyrics_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38079448-1923-4330-8175-21271c085781/deep_cleaning_checklist_for_restaurant.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/rudux.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/65671899069.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/tafiwojegepinog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfab75c-54ff-4e86-b0f6-73ef1345ee6d/72197833186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70310b81-c300-40e4-8930-ac1cf9e7353d/84346229115.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/cbr_app_apk.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_off0000a7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F0 5468 bytes
SHA-256: 6452709ba6779b021120c41d87aa7f361cf7f4732649ba5186f58e4456d91801
font_01_sfnt_off0000baac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAC 12500 bytes
SHA-256: e669081c13c7b6a519e65404ddbf904145bfcb8b2c437aca272aa8aa8b26d3c6