Malicious PDF — malware analysis report

Static analysis result for SHA-256 807b680f9eec1378…

MALICIOUS

PDF

78.7 KB Created: 2020-11-17 03:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290574ef0ef6424d629cc6e0c8f023f8 SHA-1: 5d8beeaa18ccb80240eb85c106003ff8657adbb3 SHA-256: 807b680f9eec137810954abb71df643f054f98ada32f978886ce231c224a6db2
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 'ggtraff.ru'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=seaborn+style+library
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5f95dff384710.pdf
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f878b83a8d48.pdf
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5fa170fb8b616.pdf
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5fb3036a9ab39.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8eb433e66ae.pdf
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5f97fbdd6c1bb.pdf
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5f9c3aeda3899.pdf
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5fa3ba3f160cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b8df54a6-5fd9-4eed-a944-38658fca7f28/manual_scoreboard_numbers.pdf
    • https://uploads.strikinglycdn.com/files/dc1a2618-d58f-4716-982c-35da1517c250/glamour_photography_poses.pdf
    • https://uploads.strikinglycdn.com/files/591a646b-265b-44b9-bb1f-da8cdd2b9298/26234418308.pdf
    • https://s3.amazonaws.com/gotijejaj/thomas_johnson_middle_school_uniform.pdf
    • https://uploads.strikinglycdn.com/files/55ad9969-b1f9-4628-ab2d-cd2b2a29fd39/78576327164.pdf
    • https://s3.amazonaws.com/tutasujal/woniwomi.pdf
    • https://uploads.strikinglycdn.com/files/9bd06e8e-669f-4ed2-8fbe-edda9fab284f/xejupalimemewajitama.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b9.bin
29f45e87738a939fb2f2ac7454cd87c54c2f1206e083654b39f987eab0d767c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 5024 bytes
font_01_sfnt_off000108de.bin
0ed6c9c3c0027dd2551614a0a0ad819fa215cdfb618db1049bcb53a38f291df3
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 10864 bytes