Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2668d5774b11f2f…

MALICIOUS

PDF

49.1 KB Created: 2020-09-05 20:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b5ac1ff4ac4bf2235594e58bb32ec50 SHA-1: 3a7eb0d8698726210e62d1d3de96fb06e8592b28 SHA-256: e2668d5774b11f2f79700f0bc6052989681346f39f1d3b4913ed23ff112fb62f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.link/wix?keyword=accident+and+emergency+radiology+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to trick the user into clicking it. The PDF structure and link farm indicate a social engineering tactic to drive traffic to malicious sites.

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=accident+and+emergency+radiology+pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/mixebezisigisolatunukewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/vovixupatonef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/lucky_buck_mineral.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/xewepafupidebefis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/safisusodunoxebo.pdf
    • https://static.usrfiles.com/ugd/5b9365_57d4030c4d5340a3895b27fd2f079afa.pdf
    • https://static.usrfiles.com/ugd/035627_f24a2ea7340f4161ac588be3fb1e51a6.pdf
    • https://static.usrfiles.com/ugd/19103d_9551a9d12eca42d3a258f3bd3938f95e.pdf
    • https://static.usrfiles.com/ugd/4f92c1_1594c5551649467a8dec0c237c9c53d6.pdf
    • https://static.usrfiles.com/ugd/65d6f7_6396829c34ed4230a7173d093c8b3187.pdf
    • https://static.usrfiles.com/ugd/735424_712a37dbf6f94bdda633e50b5b8a2591.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3d689228164c1db9f51abafd93d476.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc2.bin
1567056c33efedb574c0d6c4d45032b46e701672e2dd7a073f323ec9e553fb11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5176 bytes
font_01_sfnt_off00007139.bin
4fe28151328ac1141d177b601bf5fab261f8354eb34e71f3a79bc6aeb349e395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7139 10144 bytes
font_02_sfnt_off0000940a.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x940A 16204 bytes
font_03_sfnt_off0000a938.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA938 4324 bytes

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