Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3e83094fe2c5dc…

MALICIOUS

PDF

39.2 KB Created: 2020-09-03 02:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f91bfb16b3d5f306ae03d65bdd09f3 SHA-1: f65b8188d7a2c82afc368701854015223d6bc84b SHA-256: 7f3e83094fe2c5dc09ee552e73ea724a2eb205de70399caf798e10fb19e276c5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=lake+chickamauga+fishing+report+march+2019'. This URL is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains text related to a fishing report and the malicious URL, suggesting a social engineering lure. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm.

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.club/wix?keyword=lake+chickamauga+fishing+report+march+2019
    • https://cdn.shopify.com/s/files/1/0440/6394/8950/files/4034486197.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/43081242473.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/tonuruwefulisibedo.pdf
    • https://cdn.shopify.com/s/files/1/0463/3572/1634/files/zigirekezisowuwiwub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/zelevipubodekimeluju.pdf
    • https://static.usrfiles.com/ugd/b8c837_67a5ee8dde504dfd8d09119a4d987df7.pdf
    • https://static.usrfiles.com/ugd/704f6c_5f4414803f6c41e9b1f3bbe58309e50c.pdf
    • https://static.usrfiles.com/ugd/754d94_3e9bbddc313c475d8ff37867fe10bb93.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aeafbef4f54d0883ca3820e25ac78c.pdf
    • https://static.usrfiles.com/ugd/b8c837_89285515dba146d78a22f869ad5f555a.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_f99ce32329324c57b64eb2145aa42136.pdf
    • https://static.usrfiles.com/ugd/c33cdb_086fbd2027a546f5a27fe9bb929d5aa3.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_27835eed3548409f844da5b44285fa8a.pdf
    • https://static.usrfiles.com/ugd/6f9b04_b544741e06e340078704c72a423d5db9.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_off0000577c.bin
9dd6272a8b358998a3b651a5a43dc70530d89392db4436e83ab10515f2b579aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577C 5884 bytes
font_01_sfnt_off00006b6c.bin
ca8c1a39cc99b8debb8db364a7919fc357fe8760c3d0d1324e76e7d93c4d082e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 10616 bytes

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