Malicious PDF — malware analysis report

Static analysis result for SHA-256 925ea42b258c267b…

MALICIOUS

PDF

57.4 KB Created: 2020-09-04 12:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bf065a9b6928cc0d3c63f56effb8ff9 SHA-1: 6e9c38fe36966a4867a6327d3f28cae93913542f SHA-256: 925ea42b258c267b3db860d80b1dded54dc509d5665ca44d10488ab9ab224974
120 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=walter+bagehot+lombard+street+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external PDF links embedded. The document body, though heavily obfuscated, contains the same redirector URL. These factors strongly suggest the PDF's primary purpose is to redirect users to malicious sites.

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.me/wix?keyword=walter+bagehot+lombard+street+pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/6805664862.pdf
    • https://cdn.shopify.com/s/files/1/0463/5459/6001/files/69008940733.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/introduction_to_psychology_plotnik_1.pdf
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/62841355374.pdf
    • https://cdn.shopify.com/s/files/1/0434/7700/8550/files/baby_shower_invite_template_boy.pdf
    • https://cdn.shopify.com/s/files/1/0448/2321/6285/files/steuer_2020_anlage_av.pdf
    • https://cdn.shopify.com/s/files/1/0460/7236/5220/files/annie_dillard_sight_into_insight.pdf
    • https://static.usrfiles.com/ugd/09273f_9a81c91dd0684317a89684f8d1a2d662.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35b832cc50148b8aeebe5931d5bafee.pdf
    • https://static.usrfiles.com/ugd/0d002d_20ccadc4b2434987b805a4474db0c84a.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdf
    • https://static.usrfiles.com/ugd/98857b_944a92a0d83748f1b8322f804db873a9.pdf
    • https://static.usrfiles.com/ugd/54fa57_bafa7a67bb114cf18584677a9904434d.pdf
    • https://static.usrfiles.com/ugd/0049ca_8575dc9851304050976f72daafd6acd7.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_14e5ecf429874a9aa5be6415b405be88.pdf
    • https://static.usrfiles.com/ugd/cdb50c_26b4c8a2e8a04a45ad5e2551b04b8b1a.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_off0000a323.bin
39d537bb2fbab6860a33b2386de01c302dfbfc9a361dddb918a4cb043de61186		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA323 5608 bytes
font_01_sfnt_off0000b611.bin
165916d25c0bcb5472f8765ace016030cac7611f76356838c6996762b026b9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB611 10324 bytes

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