Malicious PDF — malware analysis report

Static analysis result for SHA-256 4321869c50cd8c24…

MALICIOUS

PDF

48.5 KB Created: 2020-09-11 05:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8bb12b65ff2816450dffa72d5e247d6 SHA-1: fbc0b95167e095b2da991c6ccf9c42c46d772fd0 SHA-256: 4321869c50cd8c24a44cf19ac8d8e8efeb7666892ca1978e6c6dc8c33b4fb18b
130 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection strategy. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into clicking a link. The primary malicious URL identified is https://ttraff.link/wix?keyword=cadewa+real+2015+english+edition, which is likely used to direct users to a malicious site.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cadewa+real+2015+english+edition
    • https://static.usrfiles.com/ugd/cfbfd2_ba01c182ca5648bea961903d4df65788.pdf
    • https://static.usrfiles.com/ugd/b28ae2_4a443dc0bfcd4750a36a6a666adc4049.pdf
    • https://static.usrfiles.com/ugd/4a6c57_60cfb074f1b8453aaab2c3065a711e86.pdf
    • https://static.usrfiles.com/ugd/6cf392_279ae4eeeba7460290a5f0b6431197a2.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_7852b26457204af08794dc764c492352.pdf
    • https://static.usrfiles.com/ugd/843280_0eac9e5707de466197d4a4fa4330e035.pdf
    • https://static.usrfiles.com/ugd/bc4951_ed974008366d47ea9617aecda653a9da.pdf
    • https://static.usrfiles.com/ugd/cf79db_90e84fcd5dc74e8aa787f072545693e0.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_e9b91a7dab79448a9d48d54c4629d560.pdf
    • https://static.usrfiles.com/ugd/06497e_1d655a476bd140e7940ae06f154768e7.pdf
    • https://static.usrfiles.com/ugd/f1c748_ce6649d444bb4d86afb3d3331b2ecd8b.pdf
    • https://static.usrfiles.com/ugd/ee4d88_4541a46e0b9f45e19147d8eef5b63d16.pdf
    • https://static.usrfiles.com/ugd/865d50_8bcfeb6f04064779b25e806d519e6c0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_650183f1d51f413196dcc08892f593b3.pdf
    • https://static.usrfiles.com/ugd/d2751c_edbd2922cb70443591e03d492213dd78.pdf
    • https://static.usrfiles.com/ugd/b58d21_5c415428c2464a5e82d32695c5f6f3e2.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_off0000646d.bin
8f1c17a12b5e9c0e7b78f397be6400659152bf7e092250965565a321c248eff9
pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 5440 bytes
font_01_sfnt_off000076f8.bin
524d5c9f81e034ff91ff5f8a148875eb89260e05b0397582c153c8bd6d6e0be4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 15596 bytes
font_02_sfnt_off0000a747.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA747 4324 bytes