Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9035b2029b8845…

MALICIOUS

PDF

39.1 KB Created: 2020-08-01 06:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b19e7c51b7e7881999e791670298cf0 SHA-1: 994cd314eeb0f001d3e16603d2e09a5f63463b7f SHA-256: bf9035b2029b88455c92a30d75162e03fc9a8f439a0d44efc699c049283c1c63
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.ru', which is used in a lure to trick users into executing commands. The document body explicitly instructs the user to copy and paste content into a shell context, aligning with the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. This suggests the PDF is designed to facilitate the execution of further malicious code, likely by downloading a payload from the provided URL. The presence of numerous external PDF links also indicates a link farm strategy, potentially for SEO poisoning or distributing malicious content.

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.ru/pify?keyword=how+to+upload+projects+to+github
    • http://files.photopiakc-photobooths.com/uploads/1/3/1/4/131438111/6072004.pdf
    • http://files.kirkmarlenespain.com/uploads/1/3/0/7/130740298/5564514.pdf
    • http://files.supportiveconceptionssurrogacy.com/uploads/1/3/1/4/131406060/2396154.pdf
    • http://files.silverrescue.org/uploads/1/3/1/3/131398334/likiremegemop.pdf
    • http://files.soundplanning.com/uploads/1/3/0/8/130813855/c7cbc8.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/benoruwaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/21873802217.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/71560041420.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/gibomiboxawifed.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/63385010862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/vufifovonomojuropavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/wisolukij.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/35425725331.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/66294103425.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_off0000591f.bin
ca3af052515f2996413f31d9d00d394303a20c99e7440d7fd23fae6c305d00ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 5604 bytes
font_01_sfnt_off00006c34.bin
65d089dd598aa79a624dd5e8a417f00eea03cc0ce8ad24cced7c3b0cde9d3b1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 10644 bytes