Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bb91da86b71d4e…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 10:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cf1bf277e8398e9fce2cd7b92fb1c29 SHA-1: 4ccb0ad0d3978fa7a85892b4dd45b7e1f5bfae39 SHA-256: e8bb91da86b71d4e7ec4f0f5f22f268c1430fb7749042db5ab9fa9e6c707051e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=pour+introduire+le+narcissisme+freud+pdf'. Additionally, it exhibits characteristics of a link farm, embedding numerous external links, many of which lead to PDFs hosted on static.usrfiles.com. The document body, though heavily obfuscated, also contains the malicious URL, suggesting an attempt to disguise its malicious nature.

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/wix?keyword=pour+introduire+le+narcissisme+freud+pdf
    • https://static.usrfiles.com/ugd/90c678_58f802d28ddc4f7ab95c99eab665ad64.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_7527b00550574317935728c52d2d9382.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ee1936be71c74c10aeb309c1a87b6590.pdf
    • https://static.usrfiles.com/ugd/55cc32_4db56a69fe534bc294b640a4a1bb1d36.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_a1c7a1fdd84144c89380f96f4c13cdd0.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/20370276030.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5263/files/leishman_helicopter_aerodynamics.pdf
    • https://static.usrfiles.com/ugd/b8c837_2834bcfd68bd46e392f192ff386ad85c.pdf
    • https://static.usrfiles.com/ugd/f1d680_fc8ae23931f74e15b3878f656b865486.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/bin_sachivalay_exam_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/66622898045.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/java_codes_games.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006678.bin
9cbd228c9cb7830c5a15ffcb31145dda0f929379b6643222eb0a004db42ca59d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 5184 bytes
font_01_sfnt_off000077fc.bin
67fec35e015c29c86a0d9c24caaeeec18bc1b7a5df9e5e21977a6d3aa6b1ecad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FC 11644 bytes
font_02_sfnt_off00009c5e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5E 4324 bytes

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