Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8960caabe3054f…

MALICIOUS

PDF

418.5 KB Created: 2020-08-31 04:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ac2ac3b11478c89f6385cfc465dfcc SHA-1: d38c7eb098a70c514e15105a98a4b39bd5123e24 SHA-256: 9f8960caabe3054f14df1ba9cdc0dce0e5f6e6d6a6b931afb086b6a95342a232
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL that the heuristic identified. This URL is likely intended to lead the user to a malicious site, possibly for credential harvesting or further malware delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

Heuristics 2

  • 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.
  • 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.cc/wix?keyword=volo%2527s+guide+to+monsters+aasimar
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/misejeritevuvuparereti.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/haya_bukhari_novels_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/47574778702.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21ab562a21423da427b2b5f7edfb67.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/77887310452.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/zavubaxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/fenuwowidexaxukafogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/cisco_2960x_stack_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/sobevateb.pdf
    • https://static.usrfiles.com/ugd/01bc73_9c0d688a66f94ab58e314bad7e07edd3.pdf
    • https://static.usrfiles.com/ugd/87a178_0d90c9ccb76b4cb0899967057fb16389.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19415cbbbb84587b00bd428bcd33622.pdf
    • https://static.usrfiles.com/ugd/0c4177_c386b0076d1c4796a72c1e8cc8f13c07.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_off000641a7.bin
543baa822918cdd803f6a6cee5ff89a8eb5f9c92afbc4ce7cd07ad81a0600051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641A7 5144 bytes
font_01_sfnt_off00065316.bin
3d8948fb925120c7b574129e261f8be75b9b6e3618014b0811d49bfc446255a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65316 11528 bytes

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