Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dffa1bc18f02f2…

MALICIOUS

PDF

43.7 KB Created: 2020-09-03 22:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee1a048a1ffec7f0f3dcd7d3ad0122a SHA-1: 62c0b6ed808e5f28ae0a1cb8b0e832e7ab216ad9 SHA-256: 97dffa1bc18f02f256bb6c165b76c58b04e53c479a43154799a61f2037ef7f6e
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'worksheet generator math' and the malicious URL 'https://ttraff.link/wix?keyword=worksheet+generator+math'. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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.link/wix?keyword=worksheet+generator+math
    • https://static.usrfiles.com/ugd/808d8c_bc07cb15863e46aa97e3a564a2e91f6f.pdf
    • https://static.usrfiles.com/ugd/6e3131_a586700803bb4745a121d26ba59e6180.pdf
    • https://static.usrfiles.com/ugd/d2751c_8c409ed9198846e69135b03d21fdbda2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/2c8d66_0e33a438d94245fb8c18d0ae2757c0c8.pdf
    • https://static.usrfiles.com/ugd/882da0_e0c713ac21d245a399b653508a0745b6.pdf
    • https://cdn.shopify.com/s/files/1/0462/8483/2928/files/winozuzogub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/dashing_cm_bharat_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/css_media_queries_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0462/1556/1370/files/poe_quick_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/42168773446.pdf
    • https://static.usrfiles.com/ugd/26481d_38a3e7eb8f1e4a8db94b874640d0829c.pdf
    • https://static.usrfiles.com/ugd/b8c837_748595b44b634482ad4210d496bfe28b.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_0933887b56be447f967d46c4d02462ee.pdf
    • https://static.usrfiles.com/ugd/e33828_40bb29398f7440e390262056c290a13c.pdf
    • https://static.usrfiles.com/ugd/9ef1ea_ce8d87a304934007942203e10bac23f0.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_off00006c66.bin
7a8bc63fba062a81343e96ed2901aa3924d459f1a7c1bd1202827d53404eea55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C66 5144 bytes
font_01_sfnt_off00007dcb.bin
ab582296d8813a6b095753560aa784dd51710bd5eff9939af4efb3324f02161a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 10456 bytes

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