Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1a11c31c4a0afb…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 23:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ade17b2535702acd6a68dd3306a6f8e SHA-1: 0e978fce9b1bbaaaa4fdd26b3fcd17bc2f03b7dc SHA-256: 9e1a11c31c4a0afbdaadabe8d716d285d4f6281ce2210d72be87cfd203986081
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=code+rule+56+guidance+document'. This URL is presented within the document body, suggesting a social engineering attempt to trick the user into visiting a potentially harmful site. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. 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.com/wix?keyword=code+rule+56+guidance+document
    • https://static.usrfiles.com/ugd/b8c837_6a4a28552da14ee794c5e4c0b8485d81.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ace708e8524835b9e9b6d815723726.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d831feda404e4c92f81e710a87819e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c86a6a768184e918a51f511b9c0e906.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/operational_amplifiers_design_and_applications_tobey.pdf
    • https://static.usrfiles.com/ugd/b8c837_136a7fb3610b45b89b3d2de77bad39f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/a4e402_e2137fbdacc54459937658158ebcb165.pdf
    • https://static.usrfiles.com/ugd/b8c837_d29c27e147c94f83a57bab91cceceba3.pdf
    • https://static.usrfiles.com/ugd/eaf48f_6fb1f845985f44278e9a2685af322b31.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd304fa80b284c0da156ffa63fbaaa78.pdf
    • https://static.usrfiles.com/ugd/b8c837_2556911f02764007aacff729e7e70393.pdf
    • https://static.usrfiles.com/ugd/a18aa6_58338573f81d433f8510d7654835165d.pdf
    • https://static.usrfiles.com/ugd/32777b_613a2ff1d68344c6bbf0e14836d73c21.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_off00006575.bin
b19307b8f09dfb758dbc256049426ae9d071d2160634a75be52b56ca551d0c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6575 5264 bytes
font_01_sfnt_off00007740.bin
008942823de47fd42399c2848d067797fc01620b67df57a36ed4e05d880f425a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 9892 bytes

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