Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c603f00d4f5da8d…

MALICIOUS

PDF

55.5 KB Created: 2020-09-02 12:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9815acc87c3fdbe30727a29d405ba287 SHA-1: 7be84194aa6dcf0541f5867188305dc412725c0d SHA-256: 4c603f00d4f5da8d1e7a07f7dad51d73e3ec49b368dff250614cf03b3a474601
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=japan+rail+pass+guide+du+routard'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains references to a 'Japan rail pass guide' and the malicious URL, suggesting a lure to a potentially harmful site. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=japan+rail+pass+guide+du+routard
    • https://static.usrfiles.com/ugd/f0f215_5662dd86e52d418e9cb11ecb3259315f.pdf
    • https://static.usrfiles.com/ugd/1decf9_5c8a3fe34d734ce3ae5ddcad2a5a76e3.pdf
    • https://static.usrfiles.com/ugd/e8506d_7d581e1f7b1543a5ba00198b93b7481d.pdf
    • https://static.usrfiles.com/ugd/575363_e3615c6c67e047b9ab132be2607c8c68.pdf
    • https://static.usrfiles.com/ugd/ab5adf_bede48b624104618b351fc8185c6f83d.pdf
    • https://static.usrfiles.com/ugd/b8c837_92eaa75140484a6493d9ee34bbaab957.pdf
    • https://static.usrfiles.com/ugd/f3cb45_0464ccfbe93a410095af062c5c39748d.pdf
    • https://static.usrfiles.com/ugd/121e37_05835c62015c493d8ea123a788fb4f91.pdf
    • https://static.usrfiles.com/ugd/cc03df_0c98e90a91c9416eba1f4e2ecf609928.pdf
    • https://static.usrfiles.com/ugd/824332_7b1124dda71949a6a52b80a723b50f86.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/80224420112.pdf
    • https://cdn.shopify.com/s/files/1/0438/5990/2624/files/forixe.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_off00009c62.bin
3ec59e2bd9b56cd020658714933704e2e6ac9897cea6e8b911ecfedd22c46da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C62 5116 bytes
font_01_sfnt_off0000add2.bin
dd7cc8bcfb99cd697007cf1b24fbfa21d32067844d61cbd29ec08673358f0333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADD2 10352 bytes

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