Malicious PDF — malware analysis report

Static analysis result for SHA-256 210ef231454c48d0…

MALICIOUS

PDF

49.0 KB Created: 2020-08-19 10:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 688907ebbc28be9e88414919f5e94481 SHA-1: c17ea4f10decc221d1e5d9ef18d0a5df6b367c08 SHA-256: 210ef231454c48d093b1c4909f6a2d88c179e278bd172ed992690c3dd0fde7a2
200 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=yahoo+finance++apk'. Additionally, it exhibits a PDF link farm and a lure for browser extension installation, indicating a social engineering attempt. The presence of a visible LOLBin command execution instruction further suggests malicious intent, likely to download and execute a second-stage payload. The document body, though heavily obfuscated, contains the malicious URL.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.ru/pify?keyword=yahoo+finance++apk
    • http://xirad.beattyscountrymarket.com/uploads/1/3/1/3/131384635/5511797.pdf
    • http://files.harvestbibleaz.org/uploads/1/3/0/7/130775017/figesosoxe-dubolaraboke-ziwiriru-boxotetedu.pdf
    • http://xirad.beattyscountrymarket
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/chrome_os_update.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1341/files/rupanigufafefuwovixolatow.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1629/files/bootable_pendrive_using_cmd.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9436/files/vajefurofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/86718900119.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/deep_ecology_movement.pdf
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/email_writing_format_samples.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/tadixuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/40021833027.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/xegaxepevajubus.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_off00007cff.bin
80f297b13b04f3f19bab5a54a6f1c22011d3b31988303b9b50d228254c7e70d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 4824 bytes
font_01_sfnt_off00008d66.bin
2068bc0b30b00b76cecac9e5cd5e8d002a9132ce543f877f77b007e88fbfec98
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D66 15984 bytes