Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e5946b133e079b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 09:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b5ef6064883cf75fb1a8e831a73c20 SHA-1: 49d072466010ee0fe8778acd32577517e2099b7b SHA-256: 90e5946b133e079bd0187826fbb679cf21a5876372284f40f7009f4cb262b780
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.club/wix?keyword=dialogue+exercises+worksheets, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.club/wix?keyword=dialogue+exercises+worksheets
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/74310901192.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/84276616899.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/599885046.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/212_419_4555.pdf
    • https://cdn.shopify.com/s/files/1/0433/3207/5678/files/rojinapowakafeben.pdf
    • https://static.usrfiles.com/ugd/353d00_536562b3e16b45638f4d8b14afe48a58.pdf
    • https://static.usrfiles.com/ugd/defcb2_372e4b73641544859dcb13f22693fcd0.pdf
    • https://static.usrfiles.com/ugd/ee4a13_a783619563bc48ad8eba544271771f3b.pdf
    • https://static.usrfiles.com/ugd/1b8612_779b06ac6fb046d981502219b4e8d0fa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/rufobom.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/99683735009.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/sesejim.pdf
    • https://static.usrfiles.com/ugd/f80014_04e629137aee4219be705d612cb00650.pdf
    • https://static.usrfiles.com/ugd/b8c837_12401f0a7b8748f8843e2e4f6a3febae.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_off000051ae.bin
ee8220d40d288bc0872be8d56478ff338642526ddd8dee4d8857423e9a2b44c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AE 5284 bytes
font_01_sfnt_off000063b8.bin
64fb3c7b4a617a7e44446729fb3d587984475887185e64562ed5f156718eaa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 13200 bytes

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