Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e8f710fee8387f…

MALICIOUS

PDF

260.2 KB Created: 2020-10-08 05:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 16689b8ab1168b036a3ed758ac0e9210 SHA-1: e27ef2c942a9cad65370e4aeb3ae4aec789fcfc3 SHA-256: 64e8f710fee8387ff49e1cf1d2a9bc1130ed66471ef92bdaffa50e42f39975b5
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=bluebird+naruto+sheet+music'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?keyword=bluebird+naruto+sheet+music In PDF document text
    • http://files.saragayart.com/uploads/1/3/1/4/131409090/199d4ac6a444.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/zugigulinavudirero.pdfIn PDF document text
    • https://site-1038869.mozfiles.com/files/1038869/96788351570.pdfIn PDF document text
    • https://site-1040434.mozfiles.com/files/1040434/35060258000.pdfIn PDF document text
    • https://site-1039187.mozfiles.com/files/1039187/67709457139.pdfIn PDF document text
    • http://files.blainerobbins.com/uploads/1/3/2/3/132302732/3145647.pdfIn PDF document text
    • http://files.wonderssassypup.com/uploads/1/3/2/6/132682030/547e4df387.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/1/0486/4101/5966/files/avalanche_destiny_2_how_to_get.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/shotgun_choke_reamer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3455/7602/files/23974397759.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_off0003bec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BEC3 5368 bytes
SHA-256: 1f7af884994db5a25ba17ce4f44603fac2098c52cce5e839c5ea160554dff5db
font_01_sfnt_off0003d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D0CC 16108 bytes
SHA-256: d562b0917ea68ea8d059eaa1d031cc67bab1dd51d48943091c782cf701c8e92b