Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11ae32060c2a070…

MALICIOUS

PDF

33.6 KB Created: 2020-08-29 09:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e9847e57688fd11b53d78fda82ad9b6 SHA-1: 4b5b76e678f04e81f9ac8b11416c955567930593 SHA-256: e11ae32060c2a07058aca290ead2688a70430a523b3d4b37de53577b704839fc
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=destination+b1+grammar+and+vocabulary+pdf', suggesting a lure to a malicious site disguised as a grammar PDF. No scripts were extracted from this sample.

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.cc/wix?keyword=destination+b1+grammar+and+vocabulary+pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/email_extension_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/68517795872.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/11844292375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/guguluj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/59801269385.pdf
    • https://static.usrfiles.com/ugd/b8c837_bebec2d79e4a49c6bd4768229736433d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2538bdd5454b47a6a6ac2cfcef7ba5b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc737180331145ea8243538ab859839e.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e71a6d8ab54cdc899373fa898d0b7f.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/fevogozepewot.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/95365700235.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/garmin_gps_76.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/table_topics_toastmasters_ideas.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_off0000453d.bin
382964b25b9172bd9afbe9ebc25a8495c1ebc8b091a7fc0273de9d5286f25fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x453D 5828 bytes
font_01_sfnt_off0000590e.bin
ebe76af9e9aed0d12e558caf3439323d25369884f1d75e64102ca0b140ecb876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590E 9532 bytes

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