Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaa2e1aa703a870…

MALICIOUS

PDF

41.4 KB Created: 2020-09-01 01:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fffee5eec36260209451302f224b9394 SHA-1: 89e69334897a14c2640a17fccf981ddf10519708 SHA-256: bfaa2e1aa703a87080dd06b632abbbb972eb2d6b517b027f900c3ade3245b509
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a '2018 buick encore repair manual' and the authoring application, suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious redirection attempt.

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.ru/wix?keyword=2018+buick+encore+repair+manual
    • https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
    • https://static.usrfiles.com/ugd/0d002d_1ca42c28b97549a488a47584bc0a30df.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/xirunotabiwanexividel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/96473561704.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/24188104580.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/behavioural_finance_articles.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3e5bdc7d51a43e58d102b53d553110a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b37cb7d5ce14beebf8bb283dede45f2.pdf
    • https://static.usrfiles.com/ugd/c33cdb_0e21991e8af5473bb45ecced1acd83ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab6f624208d14055b47fa3dfeb5fb1d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5a9a028e0b644cd8d98e93a5652333a.pdf
    • https://static.usrfiles.com/ugd/a01749_4b2411283f6a4d2c8105e6798564f215.pdf
    • https://static.usrfiles.com/ugd/b8c837_5914985513b54c4db41644b2db3b7418.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_off00004ec2.bin
4133c8bbc01dbf5cb21d4f5787dc5202c6f261aac7ca7161f85f7a7e3206433f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC2 5528 bytes
font_01_sfnt_off0000616f.bin
e377eeb67b82367040cef8db5787701e8bd22ece57c29ff2b91b60fc48d8a403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 7004 bytes
font_02_sfnt_off000073f5.bin
4044e35cbc8b2aacc3c9f20b8cf9dc5ce98da3fa898ab123f06f790da4efb923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F5 11272 bytes

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