Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c805a99d221f081…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 12:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de899c65acd52af4489b2823ed3c0b92 SHA-1: 00320b64091c7837830555f303e1be28432cd360 SHA-256: 8c805a99d221f081bd9defc5fdc17eee9f2c30c86e4de3118ad4efc9c0e734e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains a link farm designed for SEO poisoning, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=animal+crossing+city+folk+wii+wbfs', which is flagged as malicious. Additionally, a heuristic indicates a lure to execute commands via the clipboard, suggesting a multi-stage attack. The primary goal appears to be redirecting users to malicious sites through a deceptive link.

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.cc/wix?keyword=animal+crossing+city+folk+wii+wbfs
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/tadajisik.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/daily_budget_planner_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/super_teacher_worksheets_lattice_multiplication_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/free_java_7_update_80.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2e3c21bba248d6850bf709c25cec2c.pdf
    • https://static.usrfiles.com/ugd/b42fd6_5ef8fbf7f7a14426a7eec445577c8490.pdf
    • https://static.usrfiles.com/ugd/b8c837_78d6fa8d79c14cc48711ea3eae8d0953.pdf
    • https://static.usrfiles.com/ugd/f4de5e_8bc7849e71974d3eb903aafaadec2ed0.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/jizizep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/tiwekaxegezivisimor.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/popojadedisekuwosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/37077018248.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/56093523064.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/75968836128.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7974/files/annual_report_design_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/84036309526.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/vemijanetesokodokurekebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/61641392483.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/
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057df.bin
7c096f06395c72bd950457dc50ddde3039a4debe26dbb63d3cf5c0e270839424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 5588 bytes
font_01_sfnt_off00006ad7.bin
fd995b0bbf781e5664cc700b0eef751e960bdb0bcd439fab5fc83df151131363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD7 10680 bytes

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