Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd1f00e0c7c3bd6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 11:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc050cf643a42a30a2c917b3530e6968 SHA-1: c9cdf876c2d00ec2ef2b5ad99bcaf160aa5e31c2 SHA-256: 9bd1f00e0c7c3bd6b283565326fc9cf90de133108d32dde9efe6ea820737989f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'nier automata trophies guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external links and the ML classification strongly indicate 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.ru/wix?keyword=nier+automata+trophies+guide
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/xvideos_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/30826626169.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/80365207903.pdf
    • https://static.usrfiles.com/ugd/b8c837_2792ab5062254846b5f9e69b3be80021.pdf
    • https://static.usrfiles.com/ugd/b8c837_54bb935487d941cd992c41dafee2c840.pdf
    • https://static.usrfiles.com/ugd/b8c837_e09e6bdd62d4495cab30ac10ada34445.pdf
    • https://static.usrfiles.com/ugd/b8c837_91d763632ad34b97860286b937c197ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f94da350e97404c8c22214bdae5e1c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fec1fbf942ba4a808d1d1c814c909eef.pdf
    • https://static.usrfiles.com/ugd/b8c837_de8101c28447443aa733ff3c6c638ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1da03f9d3e2b4837b959e841f6fcccd5.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006017.bin
1624aa876c27222c34b850de9eec4aa2e6a630defd35317ae4b87bb43da28c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 5312 bytes
font_01_sfnt_off000071fe.bin
e9dbf778db64383e81c3cc4d77193b96a28ffc3eb46046c92af83e8268a6a76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 10288 bytes

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