Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1113cdf8a71e5f…

MALICIOUS

PDF

77.4 KB Created: 2020-09-01 23:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9383a4b9020c4c27f3f1e4904bd813aa SHA-1: 326b302572c465d3b1d2679dcca1caecf25d4b10 SHA-256: 8b1113cdf8a71e5f8f3286bce2c0dd7410a9038414d35f9c963c6df221cb474d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=bravely+default+soundtrack'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://static.usrfiles.com/ugd/b8c837_36865808e3de48bf84b4df5d9636c6a9.pdf'. The document body, though heavily obfuscated, also contains these URLs, suggesting an attempt to direct users to malicious infrastructure under the guise of providing content related to 'bravely default soundtrack'. No scripts were extracted from this sample.

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=bravely+default+soundtrack
    • https://static.usrfiles.com/ugd/b8c837_36865808e3de48bf84b4df5d9636c6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_48aad82aea9f4dc9ae1c5ac7a2329b86.pdf
    • https://static.usrfiles.com/ugd/b8c837_17a5fc63bfaa451aaf22abc72bd1edbe.pdf
    • https://static.usrfiles.com/ugd/40512e_ded48540ed2345e5818c39c64c9a5aea.pdf
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/spinal_arachnoiditis.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/91337100852.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/55734448453.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/the_secret_world_of_arrietty_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/vepamedarabedap.pdf
    • https://static.usrfiles.com/ugd/c8a981_dc7257d7fa704f0e939a8ba58520c6bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_40de1ed594de4c2d8baf9abd8154e004.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_off00006740.bin
50ab5ff9069b015b05cef251b15c4067fe9cb1d9b273ef312ddff2189a3988d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 45024 bytes
font_01_sfnt_off0000f132.bin
62b9499d263eaeea9a9d614470aba170789e3b5da2a1d687ae35f5d1338b5f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 5292 bytes
font_02_sfnt_off00010352.bin
8486b5c164d1aba9b6d85ac7159dfac2c04f74e63eaf7b56683ba9a2a2100ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 10708 bytes

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