Malicious PDF — malware analysis report

Static analysis result for SHA-256 98bb0be5394cfafa…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 02:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b125196e2bf2dc119a2cb29025013c SHA-1: 94632fbfd46694ebf2a6eb5e3e8e7ae89386e60b SHA-256: 98bb0be5394cfafa06be14521026b5b2d490f46462da467b7cc843821c20af06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=firefox+version+42+32+bit'. This URL is presented as a lure to install a browser update, as indicated by the 'SE_BROWSER_INSTALL_LURE' heuristic. The document also contains a mass external PDF link farm, with many links hosted on cdn.shopify.com, suggesting an attempt to obscure the malicious redirector. No scripts were extracted from this sample.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=firefox+version+42+32+bit
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/railway_psychological_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/arumi_e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/pirates_of_the_caribbean_theme_mp3_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/liwabitivitukewoxadetutox.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/house_of_blues_orlando_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/charities_sorp_template_accounts.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/rurudoboxoneguvi.pdf
    • https://cdn.shopify.com/s/files/1/0463/8883/8555/files/table_of_contents_worksheet_excel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7974/files/89006505315.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/39998002446.pdf
    • https://static.usrfiles.com/ugd/9dda13_394ed9554e164c90b9538df477739b14.pdf
    • https://static.usrfiles.com/ugd/f80014_218f549860e145b5b5fdf30ed3941d1c.pdf
    • https://static.usrfiles.com/ugd/07625c_9bdb1ba8c7f3439f8e45d09f1a64d556.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_off000064cd.bin
3719ab4f24ad3a4248982d731e7efd0fa7641149f56ea41d6ebd4f3d03ed43d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 5124 bytes
font_01_sfnt_off00007662.bin
3b92a004a443971a0c7e7bc6e5e793092c91eef6e8f16609f49a2f26a091ee0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 10648 bytes