Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4e6b9e04cce0a4…

MALICIOUS

PDF

62.8 KB Created: 2020-08-29 02:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 409864fe4e5dff5963f4bf205da5e81e SHA-1: 91288f73be5aada580996dcdae1a34fe08accbca SHA-256: 1b4e6b9e04cce0a4a91a8fe4985a0925e5cdfa821ab1cc246fc6d293048e179d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=chris+chan+kacey+father'. Additionally, it exhibits a PDF link farm with 26 external links, predominantly hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests a social engineering attack aimed at redirecting users to potentially harmful content.

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.cc/wix?keyword=chris+chan+kacey+father
    • https://static.usrfiles.com/ugd/b8c837_98c42a7bebad40b3bb10e7c6e3deba65.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b64ec768100434e9636d97e258b2838.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd7a737b79a64f16bd84e5ce8b452e61.pdf
    • https://static.usrfiles.com/ugd/b8c837_c00feb33403a4c248692be03764dac24.pdf
    • https://static.usrfiles.com/ugd/b8c837_38f7c5566bac4346964b40250b055254.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd8cb8e1c4cd4295b0317805ad0c1e85.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc4049ef1ab34d79861aee3141adf6b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2d11ba8215d4f77a198bde4d589db48.pdf
    • https://static.usrfiles.com/ugd/b8c837_729f1392a6704275a923f1451ad5518e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/bipisifurovowuragu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/89303320614.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/93338773852.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_off0000b8fe.bin
62125e9c0e561d431aabaa8fe458296a4cbf80c1f8e8fa068ca37d022dd8f881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FE 5008 bytes
font_01_sfnt_off0000c9ff.bin
ddb8b270205bd43db37b71629f9424fb701e2ca17a400296ac00cfcfc202cc02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FF 10768 bytes

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