Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ee2b0ba1408d50…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 12:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a6c44a1c28efadc4b0c437ede9d9d2d SHA-1: 370b957ea9e51a9225e7dcb07658a73e5e7a2ed3 SHA-256: 91ee2b0ba1408d501e452a1c20bab364306ec15098c45a52eccc3bdc0f069752
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=starlily+user+manual'. Another heuristic indicates a large number of external PDF links, suggesting a link farm. The document body, though partially corrupted, contains text that appears to be a 'Starlily user manual', likely a lure to encourage clicks on the malicious links.

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.com/wix?keyword=starlily+user+manual
    • https://static.usrfiles.com/ugd/c8a981_738c5d8028ad4ec6bcb43e1c0d12db0e.pdf
    • https://static.usrfiles.com/ugd/ce14f3_908dd49a6ce843b6ac6a140781de4136.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dff851d7e044c5e9933dc633b0d4bea.pdf
    • https://static.usrfiles.com/ugd/b8c837_b899be96b31248479493df062aafba81.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb856a9c6ec4f37b96d4757c6fd5147.pdf
    • https://static.usrfiles.com/ugd/b8c837_24f40ae37c9043b6b7bc1a45d3cb2a28.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/22604569932.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/67594518958.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/interview_questions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/14817782929.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/fimaxilazemonukalabezagig.pdf
    • https://static.usrfiles.com/ugd/f1d680_bcb1f08f367447b89aeb877c63dbd631.pdf
    • https://static.usrfiles.com/ugd/b8c837_b469bbfbb92b47b990690137d1cb885f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1383b23ffe42938e303f7af01c5fc7.pdf
    • https://static.usrfiles.com/ugd/529dbf_f7875e99c0d04b2495dc2de384e336ef.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_off0000609b.bin
9ea2818c397c24b60a79cc083c40d89dca067f9fbd42a02925312ef399f3d823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 5036 bytes
font_01_sfnt_off000071a9.bin
122dffb718ddae8876f3df72474c9a9910aea6f1c3ac81249245bfe6c00a5cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 10272 bytes

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