Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f069bc28610b5a…

MALICIOUS

PDF

48.6 KB Created: 2020-08-28 23:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b89291aa1e62a0109c91c947d24a3d2 SHA-1: 77938b848de22a1912e34e7776fa227c914000dc SHA-256: 21f069bc28610b5aa0f07153ea5b55247424af258f43740a3eb37a2ef087664c
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to contain the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the ultimate destination or to distribute malware.

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=printseal+studio+2+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B1%25D0%25B5%25D1%2581%25D0%25BF%25D0%25BB%25D0%25B0%25D1%2582%25D0%25BD%25D0%25BE
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/97750029068.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/50369892802.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/45052380409.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/38983060351.pdf
    • https://cdn.shopify.com/s/files/1/0439/1242/9723/files/buzurazusofa.pdf
    • https://static.usrfiles.com/ugd/b8c837_feeda288822742148fcb0f58dd7efac9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b3437ac93af4eedb579bd23c38eb787.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e81fd44c89242d781c1bddc7448a2a8.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/dutaxolesowovavibekemep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/54600292923.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2711/files/bruker_s1_titan_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/tugowa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006120.bin
ee400cfc6e52a41271d4dfde07a7f65232f4bc20e1a9c53e7c9ca683e96aa1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 6064 bytes
font_01_sfnt_off00007486.bin
29feee7a166b6d3db2ee03a8ee37d43681a82f2dc2931e6c28f3da5aef7dccf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 15324 bytes
font_02_sfnt_off0000a3fe.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FE 4324 bytes

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