Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dfe2741523d5c8…

MALICIOUS

PDF

59.6 KB Created: 2020-08-31 09:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49152c648d2c9b64c6bad17225d5ae69 SHA-1: 853248881c5c50e73afedf5dea4dd2c93a4386ed SHA-256: b7dfe2741523d5c8a52a908184c255e8c73055a2adb70b5b466648e7145bbf73
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to a URL containing 'clarity herbicide label'. This suggests a social engineering lure to trick the user into clicking the link. The file also contains a PDF link farm heuristic, indicating it is designed to host numerous external links. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=clarity+herbicide+label
    • https://static.usrfiles.com/ugd/3de8a6_50d593f41bd04584b6e2755f98e22915.pdf
    • https://static.usrfiles.com/ugd/15ebe2_202b6155d64840f3b5278c1644fa66cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_01f2fd2444b2434586ba0b0969919ead.pdf
    • https://static.usrfiles.com/ugd/b8c837_43733c1196504b1db6c4a34a0a534cd8.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_b59625eb73e740f3af96e97eceaa114a.pdf
    • https://static.usrfiles.com/ugd/de3d83_a9d6e4a4ad494732bd49e6b76f0c1995.pdf
    • https://static.usrfiles.com/ugd/5ecadc_fb3a8468648842edb3016c81095c294d.pdf
    • https://static.usrfiles.com/ugd/c3f88d_7aaee714f96f4c8ba7f80860a2aa37b3.pdf
    • https://static.usrfiles.com/ugd/07e02c_d110fa7b50264e21814a64e1ab9f874b.pdf
    • https://static.usrfiles.com/ugd/c7a620_48ae38f852b04afaaae63b8dfe4859e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_893b824729e540a7a7df4385467bf7b6.pdf
    • https://static.usrfiles.com/ugd/2e79a6_082abff393ee4d95bdcb1ff77c03728f.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_off0000a069.bin
e688d4dbc8726f47bd0cda54157f6e930aae6509bcc553cf1a401f431d8ec84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA069 4996 bytes
font_01_sfnt_off0000b156.bin
14a125962552c543552093f9f10dfdc67dbcef47f8967100281cdcdd81f56473		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB156 15900 bytes

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