Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8a655f667dcbd5…

MALICIOUS

PDF

38.8 KB Created: 2020-09-07 17:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ff3b5aa47198806513d3b1ec2da034 SHA-1: 158521789ce7e1af932c8e2dc56851baf51ad360 SHA-256: ac8a655f667dcbd51b444f52b341cddd74dbba123f17f9fa91e34be119ac4f07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing to 'https://ttraff.link/wix?keyword=quartz+filter+pdf+mac'. Additionally, it exhibits a PDF link farm heuristic, with multiple links pointing to external PDFs, some hosted on cdn.shopify.com. The document body also contains instructions that suggest a lure to copy or paste clipboard content into a shell, indicating a potential command execution attempt.

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.link/wix?keyword=quartz+filter+pdf+mac
    • https://static.usrfiles.com/ugd/fef806_a8b500fc1cc34c648505ab2ad416b698.pdf
    • https://static.usrfiles.com/ugd/2b25e8_33f2409137614c6ba9d9fee420144fa1.pdf
    • https://static.usrfiles.com/ugd/b09e1d_0d9f0fd175634467ab3cc0c8933950e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/vexefinuvupuwili.pdf
    • https://cdn.shopify.com/s/files/1/0431/2304/8609/files/meteoric_water.pdf
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/sullivan_college_algebra_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/arachnid_hollywood_tamil_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/97909401246.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/88675569999.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_off00005a6f.bin
ba851c9fd744bec49befe421ba8772b3a2139ec68d4eb7417e24daebd34f5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6F 5232 bytes
font_01_sfnt_off00006c34.bin
ff0679bb7bf15153efbeb5a4f354b6f301b4e8d397899d859e18e317b2888fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 10288 bytes

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