Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab7c7d5c355cc54…

MALICIOUS

PDF

36.2 KB Created: 2020-11-03 16:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 287dbedf6ee3a567ad0ab9185f095b1e SHA-1: 115972f871b580956f4dd0ba6efca52711aa98bc SHA-256: 2ab7c7d5c355cc54835a57cb37efa845af334428b3c764e134942000135c88ce
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, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL, https://ttraff.com/123?keyword=ti+34+ii+user+manual, is likely intended to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL suggests a phishing or redirection attempt.

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://ttraff.com/123?keyword=ti+34+ii+user+manual
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f93f0b72f35c.pdf
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5f974940e8a39.pdf
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5fa04f1f5db96.pdf
    • https://cdn-cms.f-static.net/uploads/4407069/normal_5f97528a88fea.pdf
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8b72b02bddd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03eac322-e041-4b11-a097-00e1b252e182/53305674254.pdf
    • https://s3.amazonaws.com/bixumiburi/900_watt_microwave_reviews.pdf
    • https://s3.amazonaws.com/nezanurugega/rupisu.pdf
    • https://uploads.strikinglycdn.com/files/32bb54f9-106c-4e80-856d-f138094839a9/24291276593.pdf
    • https://uploads.strikinglycdn.com/files/38ca1608-ff44-41cf-8d84-c0ae6ac21420/salekepopubilufuguxurete.pdf
    • https://uploads.strikinglycdn.com/files/84acaf9a-bde1-40d6-bb96-4ba0708c8c24/lewojinavukogu.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_off00004d5c.bin
e311f4afb6c2716afafc8b2f2b459f02a058a11fdf5dff3aa7d8fc044284c454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5C 5032 bytes
font_01_sfnt_off00005e61.bin
4a614086698eae695bea0a02a8a2ddb66663ed45ec81a8716476b51414598348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 11256 bytes

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