Malicious PDF — malware analysis report

Static analysis result for SHA-256 9614280bf386b7b4…

MALICIOUS

PDF

45.1 KB Created: 2020-08-17 16:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f240272438481d1c7f18094d4f51695 SHA-1: 5a692f1558c628885c399d95446cd2c261464b37 SHA-256: 9614280bf386b7b404d03f88888be39d846e2880dfbc3eebd5c224769074ea0e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm. The document body, though heavily obfuscated, contains text related to handwriting practice sheets and a URL that appears to be the same as the malicious redirector. The primary malicious link identified is ttraff.com, which is likely used to redirect users to further malicious content.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=free+printable+cursive+handwriting+practice+sheets
    • http://tegal.kskitchen.net/uploads/1/3/1/0/131069839/mexanapazerid_fegik_sixuxo.pdf
    • http://files.rusticreflectionsdecor.net/uploads/1/3/1/4/131437889/7165627.pdf
    • http://jofelaj.troop80.org/uploads/1/3/0/7/130775727/5794725.pdf
    • http://files.yuukan.com.au/uploads/1/3/0/7/130739322/bd550df9039fe2.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9697/files/notibope.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/wobibiboxaruwapogos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/katuletemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/xisopukizexedas.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/pedeniruzinijarag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/diloverunufaditeviroson.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/98992559561.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/68566031620.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/73111666398.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/overwatch_failed_to_connect_to_server.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_off00007112.bin
319f492e99872724dff20821bf33e4ff441295c3f555b080b2ba3545fdbad8e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 5584 bytes
font_01_sfnt_off0000840e.bin
fcd2bc623467c70ebd9f1cd62dc495885387425b87d4720f030af8ac5af5b6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840E 10344 bytes

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