Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d1c4e3b4b97a29…

MALICIOUS

PDF

56.9 KB Created: 2020-11-06 20:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76efc109119edd11e784c2bc44500acc SHA-1: 5a68a312deb65782b3b3a38af2f373359115b9a4 SHA-256: 87d1c4e3b4b97a299ca9ba791fcbbb6cd1b75634ed7b639431fee9336d3bb9b6
94 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://traffmen.ru/123?keyword=gear+code+for+btools+roblox, is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains text related to Roblox and a gear code, likely serving as a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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://traffmen.ru/123?keyword=gear+code+for+btools+roblox
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8763b46c002.pdf
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5f9f09c784f95.pdf
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/3524045.pdf
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87706c5cd17.pdf
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/kodabonisifis_wagotafunab.pdf
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f8a0362eb591.pdf
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fc74d9089574.pdf
    • https://cdn-cms.f-static.net/uploads/4404739/normal_5f976442339ca.pdf
    • https://dabituge.weebly.com/uploads/1/3/4/3/134344098/2b18189f5e47.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://kebupud.files.wordpress.com/2020/11/16674380217.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092a5.bin
325a8b789b8b024739cce2948a402f5b057513bf729835aa349428265b9b6a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A5 4888 bytes
font_01_sfnt_off0000a35e.bin
5f36860951cfa5d71bda4f531e5ea56dadccbb645bc7530c1eb33534392691be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA35E 11440 bytes
font_02_sfnt_off0000c8cd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 4324 bytes

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