Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89d1c71aa7c84ff…

MALICIOUS

PDF

51.0 KB Created: 2020-09-04 20:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03046f09cac2bb624706f341c6b3d0a6 SHA-1: 316421328832063cdbf55da4ca3b547c959377d9 SHA-256: f89d1c71aa7c84ffb354b8c06d7e22b08c481390b24c3571522c67d045f8ac59
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'incurred cost report meaning' and the malicious URL itself, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of multiple external links, further supporting the malicious intent of redirecting users to external sites.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=incurred+cost+report+meaning
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/81896578294.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/49722377910.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/zimifawupasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/consecuencias_de_anorexia.pdf
    • https://static.usrfiles.com/ugd/f6a907_91ece96e544349dab848babc35963511.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_942f2fbdf7a242c981bb776b108d2ab5.pdf
    • https://static.usrfiles.com/ugd/913720_6cdb1ad7df5e45698b07ade448ac16a9.pdf
    • https://static.usrfiles.com/ugd/e4a001_61221d3dcd7744f18c1d0fda29508a76.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_c3d9dd7890dc45a399ac63ada01a61ae.pdf
    • https://static.usrfiles.com/ugd/5ad03d_582bfd4582cf47a9988bb8dbc7f6ed7c.pdf
    • https://static.usrfiles.com/ugd/b88e3d_623dd3fdba8f49a4b1e87afad228eb5b.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_off00008966.bin
4772d4941c474e096cef529e1cceec0681076c4954a6e9f3b2f0e0451e59dcbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8966 5300 bytes
font_01_sfnt_off00009b56.bin
e5a217681b28325e883205c956a6b636ace5781bc36fbd465ca4b141fad15096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B56 10496 bytes

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