Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec738313d06701da…

MALICIOUS

PDF

45.6 KB Created: 2020-09-06 15:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f0779c73db1da0633dbcd1dba1f7d4 SHA-1: c250b8728adb2d4ca8ebd7abc20d6f31117ed73a SHA-256: ec738313d06701da48d44097c49f869befb684908cd4b942f8ff91ce908b832c
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 pointing to 'https://ttraff.me/wix?keyword=cryptocurrency+trading+course'. This URL is presented within the document body, suggesting a social engineering lure related to cryptocurrency trading. The file also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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.me/wix?keyword=cryptocurrency+trading+course
    • https://static.usrfiles.com/ugd/0baf77_a6d92e8a483b42c2b98de4f6fcbef3bb.pdf
    • https://static.usrfiles.com/ugd/3de8a6_8fab407f3e014b0296de861b3a2303da.pdf
    • https://static.usrfiles.com/ugd/c70c35_6fe69db2e1634367acbaf628b6bbf2bb.pdf
    • https://static.usrfiles.com/ugd/85d67f_c273f80acc39481cbb180da3682d7ba1.pdf
    • https://static.usrfiles.com/ugd/f390e7_8e4ef7de82394672b3adde1f00c534e5.pdf
    • https://static.usrfiles.com/ugd/bfbc46_b093dd9b650a4d06a1a67498f5b4e065.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/1095652538.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9061/files/94950793026.pdf
    • https://cdn.shopify.com/s/files/1/0462/4354/5237/files/gadusubipagamivav.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/kuwebugetirir.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/analog_storage_oscilloscope.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/mukedosarukukefolelufatut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/56413239208.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_off0000727e.bin
de5169f97889598572781b105eaf5d5be7c008533924f980a3a383fb9b8d4012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727E 5216 bytes
font_01_sfnt_off00008454.bin
5014543d2bed6aec720dea3325ccc5ff1b9f1a99b5fccbaac0e4c9c4e3de7ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8454 11376 bytes

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