Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028a6eabc5c9656…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 19:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c84b63856d9eb8df6235343d59eba1a8 SHA-1: fb03dd5ff0ba137fb765c6a318236dbbc0cae60f SHA-256: 3028a6eabc5c9656cb37df95c7571aa3f203888c14d42dc67b917b9c95b09db8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure related to file conversion and includes instructions to copy/paste content into a shell context. This indicates an attempt to trick the user into executing commands, likely to download and run a secondary payload from the malicious URL.

Heuristics 4

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=converter+mp4+avi
    • https://static.usrfiles.com/ugd/b8c837_ec3d689228164c1db9f51abafd93d476.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20e34dc86bb4b579029d044e266d776.pdf
    • https://static.usrfiles.com/ugd/ab0441_c2236faecf2a4e698906b0728a6ebe5f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/automatismes_et_automatique_cours_et_exercices_corrigs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/85328046655.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/44068306792.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/45557161775.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/benim_hocam_tarih_zml_soru_bankas.pdf
    • https://static.usrfiles.com/ugd/36f25b_49d091ba9d004ef3b4b14928a30af4e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4adedca71c6249a7bcc29ecf813a5d93.pdf
    • https://static.usrfiles.com/ugd/b8c837_25d91c7bdb5b46f9a90f6ebb338b124c.pdf
    • https://static.usrfiles.com/ugd/90423f_5e112f7184ec4dcab2ec7b86c3b19881.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa45744545c741968350e6445c0ffc5f.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_off000065e0.bin
c78f9e121a4b45cb1ca190c7cf98ef1e149f3a0d727e6325c818e37e3d1d5b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E0 4808 bytes
font_01_sfnt_off00007625.bin
0065b8589b067f2d3622b43089665f60caa8d6939a79236a69fc0156974dd420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 10816 bytes

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