Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83ebe9bf4afa008…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 06:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b337a0e156261e6588e521f45969576 SHA-1: 19520c662693172a0b124113d67afb846311e090 SHA-256: c83ebe9bf4afa00854d3cd63057e20ee77edeb2b02157fa299de1bc65b659224
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious link, https://ttraff.cc/wix?keyword=usb+digital+microscope+measurement+software+free+download, is designed to lure users into downloading potentially unwanted software by promising free tools. The document body, though heavily obfuscated, contains references to this lure and the malicious URL.

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.cc/wix?keyword=usb+digital+microscope+measurement+software+free+download
    • https://cdn.shopify.com/s/files/1/0436/5202/2430/files/36973000546.pdf
    • https://cdn.shopify.com/s/files/1/0432/2544/8615/files/non-_conformance_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/xemivofonew.pdf
    • https://static.usrfiles.com/ugd/d55797_6f00959c9c124fd8922d3094294d7af7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eb7c0c4a5ac4d84ac2deba233118111.pdf
    • https://static.usrfiles.com/ugd/55cc32_bfa5bb11d3804ca7a3e6331fb4d9e55f.pdf
    • https://static.usrfiles.com/ugd/ea2f88_bf84286db45542da9597acf91c710932.pdf
    • https://static.usrfiles.com/ugd/590778_6492f157dd354644ba5ab5a91259826c.pdf
    • https://static.usrfiles.com/ugd/de60da_3f5bb2c9911c4047878e64ab918ef6ed.pdf
    • https://static.usrfiles.com/ugd/217d68_76c40b70c26747aa9607648efb3e0578.pdf
    • https://static.usrfiles.com/ugd/07625c_04b9aaf2952b4ac5a3db2012c8d27e29.pdf
    • https://static.usrfiles.com/ugd/b8c837_275931a6218d46978e50a8921bcc6fe1.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_b412140da46c4c21ac0b18957e705740.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/61842382396.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/metric_system_worksheet_biology.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_off0000700c.bin
71c54a142a7754fd348336180d2eabc4ea9de8eb2ba08ed6301c523be5e28b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700C 5700 bytes
font_01_sfnt_off00008363.bin
2382ac996ce799440a2d3e74091230d59ea4847c2c589e7bd02dceab1ceb92af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8363 10904 bytes

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