Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc68a92d9f9c08c1…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 13:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab6b77959c4ab3345e70d1967fee5538 SHA-1: 553282b6daacd4f7fcffd90490ef378f117c4ab6 SHA-256: dc68a92d9f9c08c1faa85acfece8a1db2398ad1642f3a74a11e541c085952d3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with many links pointing to external PDF files, some hosted on Shopify. A high-severity heuristic indicates a 'Clipboard command execution lure', suggesting the document instructs users to copy and paste content into a shell, likely to trigger further malicious activity. The presence of these elements strongly suggests a social engineering attack aimed at tricking the user into executing commands or visiting malicious sites.

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.com/pify?keyword=pc+performance+ssd+vs+hdd
    • http://files.boffohome.net/uploads/1/3/1/4/131406344/5041806.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/gujutoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/viperagefewegusasifetu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/21829969178.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/nizixifexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/wigepazopitulesaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/kodefomipodapige.pdf
    • https://cdn.shopify.com/s/files/1/0436/4668/1248/files/honeywell_thermostat_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/sisakijalabedobalox.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/93168688766.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/tiwexa.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_off000068dd.bin
d803ff5c497f2907bf1540b4c332c896c52a0ff6088bcd3814458e1bada3b0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5084 bytes
font_01_sfnt_off000079e1.bin
bf8f3184644c1d244dc28893b22a4215ea5ac86fffab134c81d0f60eb1bcc0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 10272 bytes
font_02_sfnt_off00009d11.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D11 4324 bytes

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