Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f7b77efdab7c9e…

MALICIOUS

PDF

36.2 KB Created: 2020-11-07 09:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2c59e63d81df2a650fd27b2cf74a6978 SHA-1: 2a9d918d8f4361a23f620b3c2683a5f6db42d605 SHA-256: c8f7b77efdab7c9ec2b1575fb0e5538e2eb7c1688df4e3b0c447000a1bd01142
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 critical heuristic firing indicating a malicious redirector link to 'https://ggtraff.ru/123?keyword=grip+tite+sockets+home+depot'. 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 suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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=grip+tite+sockets+home+depot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f88b3732d648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f8e0f786cc54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f882ba92b599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fa1927ed2e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f8760d370554.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ceac1d0-cf00-4e9e-b7a0-22ac52594228/heart_diagram_labeled_black_and_white.pdfIn PDF document text
    • https://malopotobi.files.wordpress.com/2020/11/bubiledewadutagofamujaj.pdfIn PDF document text
    • https://sidelid.files.wordpress.com/2020/11/pagofib.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0441ce8-692e-413a-a5b3-ab70f850d36d/allegiant_book_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4342 4848 bytes
SHA-256: c0526ebef7c3c35b8f5385deecffc938480d6ca5efd2e9b42c464d42554fba96
font_01_sfnt_off000053c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C2 9996 bytes
SHA-256: 0d5914ff72b3892febb7bb5b5dc8e8cf637cce61234494e1bde23d89d9876db8
font_02_sfnt_off000075ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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