Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e55fb7325c43f4…

MALICIOUS

PDF

48.4 KB Created: 2020-09-07 06:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dcb6aaea5a7818add983b0cfe0a3ae0 SHA-1: 1acbc863d78be55944abeff2586c39117c9e3dbe SHA-256: c3e55fb7325c43f45f15800f8091bb1ec88c2d8db3b09685ebbab9a15b0259c8
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking the 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/wix?keyword=definition+of+vermiform+appendix+in+anatomy
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/yellow_submarine_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/98694206925.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/ligowixofovitonodijox.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1336/files/assinatura_digital_creator.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/wella_color_touch_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1336/files/8414736892.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/castbox_latest_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/analytical_maths_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0428/files/freshclam._log_is_locked_by_another_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/healing_back_pain_naturally.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e09d8b6de35499d85ff50e2c54497e0.pdf
    • https://static.usrfiles.com/ugd/d63aaf_6d81322ea47b4b9a89c76fef1c33846b.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/51090278328.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/wipalatavife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.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_off00007e80.bin
d24fb13e372127b5f82bed2da50728984f06d60c55b5dc5ec98d52d7426947fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 5204 bytes
font_01_sfnt_off00009038.bin
111ed302bac7ee526c7cdc63ce287e032024bf10dcc79503a82127226385395a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 10472 bytes