Malicious PDF — malware analysis report

Static analysis result for SHA-256 39964f6fcd6f576c…

MALICIOUS

PDF

47.9 KB Created: 2020-08-03 00:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79eb79d679c5b36a2f6c170a04c97e7 SHA-1: e485e0af13c9ffc2139f54664e6f93bcf7b1a2a1 SHA-256: 39964f6fcd6f576c6f57f4b1e2919916e6cb92652d99d59f9aa66ebed735287c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1059.001 PowerShell T1539 Steal or Harvest Credentials

The PDF contains a lure to copy 'ssh key to clipboard' and paste it into a shell, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' and 'SE_SECRET_RECOVERY_LURE' heuristics. The embedded URL 'https://ttraff.com/pify?keyword=copy+ssh+key+to+clipboard' directly supports this attack pattern. Additionally, the PDF acts as a link farm, with many links pointing to shopify.com, suggesting an attempt to distribute malicious content or phish users.

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.com/pify?keyword=copy+ssh+key+to+clipboard
    • http://files.azrielbermant.com/uploads/1/3/0/8/130813965/100239.pdf
    • http://jiniju.skinnypigbreeder.co.uk/uploads/1/3/1/4/131409309/2c252638bb1803.pdf
    • http://files.reaysplace.com.au/uploads/1/3/0/7/130776619/c8bdf.pdf
    • http://files.bellevuebritishblues.com/uploads/1/3/0/7/130738924/sinupo-fikojika.pdf
    • http://files.itqansports.com/uploads/1/3/2/3/132303353/5213518.pdf
    • https://cdn.shopify.com/s/files/1/0437/3004/3041/files/docker_mount_current_directory.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/39013538043.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/rosix.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/ziritapigutivederis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/satofukomogivemuzuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/zekujog.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/rupasulibarawufaxowuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/6081534161.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/14076292106.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/65302718809.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/mulinitonilur.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/49366320659.pdf
    • https://cdn.shopify.com/s/files/1/0439/0282/8699/files/pdf_viewer_for_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/vitilukazube.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_off00007106.bin
a924614cca124536c4121adec7cca9df3df26518993914bc506bb91ee41c4811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 5372 bytes
font_01_sfnt_off00008340.bin
e0d0ad8e1f7e9bb25002cc317b18014e93c612d502a86bedb785b9a123bfa891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 15068 bytes

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