Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef296579008c7f16…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 06:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72cc481c89b7c3a5ad0a6e580ad269c7 SHA-1: b0ec1fe6985a7d8137f9123ddb551c6f63b2b9cb SHA-256: ef296579008c7f160582555d30a571891bce0e2e6cbb3c65e9f763849e7c657f
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 'ttraff.com' with a query parameter suggesting an employee agreement template. This indicates a social engineering lure. The document body, though heavily obfuscated, also contains the same URL, reinforcing its role as the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, likely to improve search engine ranking for malicious 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.com/wix?keyword=employee+agreement+template
    • https://static.usrfiles.com/ugd/2b3f46_681b7a0e293d41289ee406f67d99b62e.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_5f3aa1e632a943908fce21c2b4218d48.pdf
    • https://static.usrfiles.com/ugd/b8c837_e743e309f0464d0c8406f27b12852f59.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/56942990708.pdf
    • https://cdn.shopify.com/s/files/1/0445/2545/3471/files/campbell_biology_chapter_18.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/tutagelanuvow.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/36790344449.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/zisawomanupuzivisaxiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/novinoriwojawulorivikilu.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed4e5c9e25a441da7a1e67086ae9b1a.pdf
    • https://static.usrfiles.com/ugd/b0b521_f7edc04f93b14bd4b8cd6df5aa5f4d11.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17552b164244daab654726789373449.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_off00005b3f.bin
78463addb7395fc9b9b04e10c2c617e3afb09b1801b1da1eb5a707390e19dddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3F 5020 bytes
font_01_sfnt_off00006c44.bin
ac8fbe35538ccb520c98a4b371a8e55d5225e516249cc368c8985e8f0ad5f165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 9812 bytes

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