Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89acdf31e659542…

MALICIOUS

PDF

62.5 KB Created: 2020-08-31 13:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335d939d6b8226242b32d8825e20c457 SHA-1: 638ebb875da90a6710c9715bd476bdb59b50fa2b SHA-256: b89acdf31e65954241ed5b1fda38f29f913f824b03776d8cdc0492e763a05ad2
160 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a recruitment policy template. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing something, likely malware or a malicious browser extension. The PDF also hosts a link farm, pointing to numerous other PDFs, suggesting a broader SEO poisoning or link distribution campaign.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=recruitment+and+selection+policy+and+procedure+template
    • https://static.usrfiles.com/ugd/67e251_d0db0024bf524ba98f3aa6f9f9066bdc.pdf
    • https://static.usrfiles.com/ugd/e643da_2e4cebeec2794316b9190ceef179b6cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d82431258d294cb28df6f2b71e44f2a7.pdf
    • https://static.usrfiles.com/ugd/b910ae_654a5499d5c74acf829c9f7984f361e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f9b45a3acce4baba8cc676b4073a5fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b02eeaa05704768a4dc0be4137c9f2e.pdf
    • https://static.usrfiles.com/ugd/cec570_259953b2386d4df1a4dcfce70af1e450.pdf
    • https://static.usrfiles.com/ugd/b8c837_967c680206f94bdcaf5255e01cd8d53a.pdf
    • https://static.usrfiles.com/ugd/a59130_fae53b8687ee441791fcf4838c9ac502.pdf
    • https://static.usrfiles.com/ugd/b8c837_24029676a1e841fd88e991b941f4c2c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_35365b011cf343b1aaa7679df2683cec.pdf
    • https://static.usrfiles.com/ugd/4dd980_856b9af04cc541e19db1328a03521def.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_off0000b825.bin
e97458a5ab1f1ed8b1008cbd5a6150486bb477325295b64ac71d38c62826403e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB825 5328 bytes
font_01_sfnt_off0000ca38.bin
004c6e8079aa091679d266d548500675d6c36e7df4b65de130b0dec0f5244bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA38 10092 bytes

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