Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5e427b84ef3389…

MALICIOUS

PDF

32.4 KB Created: 2020-10-30 18:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 208325b52a0542cc35eab8c7b4b91896 SHA-1: 98ad33eecfde050f6441fe730c67f52270d1d118 SHA-256: 2f5e427b84ef338986b7f9af69122c71bb75a88378b7278f5426e9d74a857631
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, https://ggtraff.ru/strik?keyword=glass+cake+dishes, which is highly indicative of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain URLs that are likely part of a phishing or malware distribution chain.

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/strik?keyword=glass+cake+dishes In PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/33188a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f8b401dd4d01.pdfIn PDF document text
    • https://solujokorox.weebly.com/uploads/1/3/4/1/134108712/9797a1ba7abb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f93e8c1605e7.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/7250269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f94b506b7cae.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/b3fafde7-883b-4210-813c-caa60e8896d9/canine_dental_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba21e49-637f-43aa-8049-0d2cb8ccd5bf/verogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6976b8-c776-415e-912a-57c85f0cd129/puwusaxet.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/jofika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/6631/5714/files/18803012875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32090d62-e2b2-429c-be2a-9cf2a8233159/16866243899.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_off00004678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4678 5024 bytes
SHA-256: 2282dcbc4c7ec19cf44c39265eb0732bc5d594b99f4cec4ceead131a906b4911
font_01_sfnt_off0000578a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x578A 8700 bytes
SHA-256: e150863fb2b227da9402c5c964a17f1497920f07145e0ed24bdc4791a54a198a