Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c84dea1b51d5b0…

MALICIOUS

PDF

33.8 KB Created: 2020-10-05 01:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5a1ff91eaf752e9ff1d949112f5b9de3 SHA-1: 599edc0ce56f7d25556ae1eb16bdbccbabaed9c2 SHA-256: e7c84dea1b51d5b09627f8bf370726fb493d7568579d148c521226ed2b410d38
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://gettraff.ru/strik?keyword=already+just+yet+exercise+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a potentially harmful site.

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://gettraff.ru/strik?keyword=already+just+yet+exercise+pdf In PDF document text
    • http://fosemido.hollandrunningclub.org/uploads/1/3/0/8/130813420/pigome.pdfIn PDF document text
    • http://files.kansascrappieclub.com/uploads/1/3/1/3/131382126/1644520.pdfIn PDF document text
    • http://pawusi.driesneyland.com/uploads/1/3/1/0/131071258/41f9adcdc0a.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/bc939416-dcf6-4f56-98a9-ad788b5ff6d6/kaxumumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e5c508-bba1-4770-9f37-25816c456851/denalupuwurigesirinujek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76655e5a-906b-4e02-a014-c8e8b3debae3/46112531707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89c055a-4501-487d-b5bc-3369559feaea/venedinezunugupixexaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1587/1905/files/book_report_poster_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71feb6b4-6da5-444c-8a15-d8022679d47c/54116161213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1e7f51-52fb-4e4f-9718-575f0d65a392/76123627665.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_off000046e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E9 5384 bytes
SHA-256: 8104f31d9bee6e9d4666d34e04bbfbab77047f40a90da73a31c324086e875786
font_01_sfnt_off0000595e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 9816 bytes
SHA-256: 625327438a4197a061a58439b62e274fd7aaa4a6a6e725d3165b217c15776f2d