Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53817d2db73db54…

MALICIOUS

PDF

45.8 KB Created: 2020-09-09 05:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dda23d47ec511a1ea6602bc94b50f17 SHA-1: 19ddbe39a0cea10b2f4013e9f31e73d2f8362df9 SHA-256: d53817d2db73db5462668d5ab1f65330817a3bc019e14c1ba1814530d9500b7e
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=zoo+animals+worksheets+printable'. The document body, though partially corrupted, includes text related to 'Zoo animals worksheets printable' and the malicious URL, suggesting a lure to trick users into clicking the link. The file also contains a PDF link farm heuristic, indicating a large number of external links, many of which are benign Shopify links, but the primary malicious link is the focus. 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=zoo+animals+worksheets+printable
    • https://cdn.shopify.com/s/files/1/0438/9886/3784/files/knife_gate_valve_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0446/8968/6681/files/antologia_de_cuentos_espaoles.pdf
    • https://cdn.shopify.com/s/files/1/0440/3327/8102/files/download_adobe_reader_app.pdf
    • https://static.usrfiles.com/ugd/ced2dc_d2e30fe4751648c4a79c1f7539f89516.pdf
    • https://static.usrfiles.com/ugd/455f95_e7536f96d7af47d594c8248f99b283b0.pdf
    • https://cdn.shopify.com/s/files/1/0433/8653/6092/files/atualidades_vestibular_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/tekav.pdf
    • https://static.usrfiles.com/ugd/2dbf5a_30a89960da4946c6a73ae6c3305ada95.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6a9e8a912694c90b04776d45c4eebdb.pdf
    • https://static.usrfiles.com/ugd/7dd30d_4105cf03c88147da89ff36fef46cf0f0.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_off000064ef.bin
b20b3d651adf8edef6023399c7e51bd6ad5394131b4bb67850f2fa3396b36be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 5100 bytes
font_01_sfnt_off00007617.bin
f250abb9da443bcf2306942df0ada72837ba2e83e3a285b4ab428220b541c691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7617 11196 bytes
font_02_sfnt_off00009afc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFC 4324 bytes

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