Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c5d66b5896f079…

MALICIOUS

PDF

36.3 KB Created: 2020-09-01 04:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55fa33f8b5801054a454bba43fcb5e30 SHA-1: 3bcd0c54e07482775bd8843fcc604b971fa4047a SHA-256: a3c5d66b5896f079c613132e1a560cdbcc2b8434007f24ce184dce97bdc42467
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link, 'https://ttraff.me/wix?keyword=farm+household+allowance+guidelines', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify URLs, suggesting a lure to external content.

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=farm+household+allowance+guidelines
    • https://cdn.shopify.com/s/files/1/0434/0449/2950/files/bisection_method_numerical_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/mebixaba.pdf
    • https://cdn.shopify.com/s/files/1/0459/1924/0341/files/87940281454.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/ruwinawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/1214378167.pdf
    • https://static.usrfiles.com/ugd/b8c837_669cf7f73d7d47788a173a295d4e4d50.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/24268669764.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/cacti_rrdtool_windows.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/wotezoxa.pdf
    • https://static.usrfiles.com/ugd/f63f29_51763a5a94fe4d83b3909daaea4b453f.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_67826293f77d4f7d87141d08bdbc23d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3e1e33ee8e147dd8f8349ff164afa72.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_off00005082.bin
ee677d9ac0cc4e2d341148b6ec57401c97bebf1e914c161e33ee7681d931bea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5082 5400 bytes
font_01_sfnt_off000062c5.bin
7b8a0dffde2a2b55bb1f03eb6cabb2d8a3c40b10f0b949e4adc0183f1922f70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 9852 bytes

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