Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bfc712336637bd…

MALICIOUS

PDF

65.9 KB Created: 2020-08-31 02:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4280c62dbaef3dfe925fb38f3dc80418 SHA-1: 336bdbf262bacd1e20111f719c58b73875ffb6f7 SHA-256: f5bfc712336637bd3af220862ff8014dafcc67b428d67b340cd43a5728cfa6f4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=4k+monitor+review'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are benign. The document body, though heavily obfuscated, contains the same malicious URL. No scripts were extracted from this sample.

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=4k+monitor+review
    • https://static.usrfiles.com/ugd/97aff7_db67be0878b5403180e952763d399d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cc0ab1077b84167a1418c46ceee8e45.pdf
    • https://static.usrfiles.com/ugd/b8c837_60555049390642529381efb17e044f90.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_339d2f7da983464793c7df0ed98fb0fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b3ddba51d2047e2a27f55642ec03f89.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_8a820efda71749a7a5d22665613b99fa.pdf
    • https://static.usrfiles.com/ugd/277b62_8cd5af36d6134128843eab54eee7c854.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/40627325206.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/54670279505.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_c14b23a45c8c42eda2a2b74656d6040c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8229140aaf0b41858f7c244115af44ea.pdf
    • https://static.usrfiles.com/ugd/4b7290_4848d0230c0647a0aa04a6bd94f6ca77.pdf
    • https://static.usrfiles.com/ugd/b8c837_607fbfb1d5f645238b825f8f09e0339f.pdf
    • https://static.usrfiles.com/ugd/a771bd_35fa6322d7e4478180f13e22bc210a2a.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_off0000c83d.bin
cb4cc5aae61575fb88848220712eccbf2fd22a741c026f850e875b461d9325ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D 4620 bytes
font_01_sfnt_off0000d7f5.bin
eae6a057c6acb229c4073bbbd8a9dfbf0cf982d183f546d7c94a3610cd5a89b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 10212 bytes

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