Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e641a6dada35d4…

MALICIOUS

PDF

58.2 KB Created: 2020-08-30 01:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d7512b02d89770d79cce27be0f127f SHA-1: 251d99d7f25affb2a6e74a8520af8acb6d3f0049 SHA-256: b2e641a6dada35d4adc696483c83f531f8470320c4c553e3ac789f668b73e6c7
120 Risk Score

Malware Insights

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

The PDF contains a link farm, with multiple links pointing to static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=minecraft+castle+with+download, suggesting a lure related to 'minecraft castle with download'. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=minecraft+castle+with+download
    • https://static.usrfiles.com/ugd/b5472a_a7702bf56a5a4fabb7d6a4af8d823f02.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f5505025d5b4854ab95cd8b73e34d04.pdf
    • https://static.usrfiles.com/ugd/b8c837_a14133b86e6c4c48aacd8f58d137055b.pdf
    • https://static.usrfiles.com/ugd/7f16bd_c91c24660e9e4ec8b948aa386dd4899a.pdf
    • https://static.usrfiles.com/ugd/856cea_40e0cedd59f0423998143aec9dadff95.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dfc249b14ab4e81a7130869703d6bdf.pdf
    • https://static.usrfiles.com/ugd/6846fe_f0c5b579817e484da6c0ffc55601e49e.pdf
    • https://static.usrfiles.com/ugd/097bd5_5a5497b963464448b8fc839529ced0c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6058219135d1484896c822688aac2bcc.pdf
    • https://static.usrfiles.com/ugd/097bd5_c6986d61f0784d698c44ec683151babe.pdf
    • https://static.usrfiles.com/ugd/8b9728_66eaa080b5d341b5a6ce5ee26931c45d.pdf
    • https://static.usrfiles.com/ugd/097bd5_00fc9c9e5d5f4a7c8c804b5375edd355.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_off0000a5f0.bin
afac92e539392ee00abef52866986b9a60345a6efdda0bb57cd9ea29e13b4d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F0 5204 bytes
font_01_sfnt_off0000b7a7.bin
bb2c8ab2a69444e2444de7fabb1dc299807c92787a61f3fe8e0e120f759d11d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A7 10668 bytes

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