Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf647ddf21df806e…

MALICIOUS

PDF

43.5 KB Created: 2020-11-04 12:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6908222217e47f04c26ae06d24835944 SHA-1: 1ec920b6969831d441f0479d8b01b3cd3361cbc5 SHA-256: bf647ddf21df806efadce847b4697571ff9bf80e66969f96e8d90e4d6101897f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link pointing to a URL designed to lure users with a specific product search term. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment. The ML classifier strongly flagged this PDF as malicious, and the embedded link is a primary indicator of malicious intent.

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=lg+rc897t+dvd+recorder+vcr+combo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f9b7a0b8fc37.pdfIn PDF document text
    • https://vilomaranetuxer.weebly.com/uploads/1/3/4/5/134502128/pezil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f95a558b2467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f8b177c8a7f2.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/114c28480042f.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/sarezuduf.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.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/subud/lebikudobap.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/56649890584.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/30956904782.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_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 5412 bytes
SHA-256: e2cb9c650d1b6d8b5ee2d97ee3add3bea09a5a93d3711ae52011224ee4e4fa53
font_01_sfnt_off00007e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 10288 bytes
SHA-256: 161c93362d638604f41ae5f935a56aee804f280811c2f44de6723d5aa8de1a52

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