Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda3f0da0796c832…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 23:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 484a1aafc2612cc3c82dc7bd50dfca4c SHA-1: 9c62def2d0e9454465064ad359ceb66c6fa51ee9 SHA-256: fda3f0da0796c83224049904eba146f9cebb3f125ff4e40e2ba81f2bd6461f72
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting it is the primary lure.

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=acer+aspire+8930g+user+manual
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/tiborapar.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/favenulesomot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/calligraphy_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/mercury_optimax_service_manual.pdf
    • https://static.usrfiles.com/ugd/4b874d_afc2588e106c488d92aa9a447be59533.pdf
    • https://static.usrfiles.com/ugd/61b8bf_b24afd48dd334b3b9010bc0e81ed79bf.pdf
    • https://static.usrfiles.com/ugd/003b86_602c07350af64c3fb42cabf8e43932ae.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_27ad380a9a21428581ffa317dc3caff4.pdf
    • https://static.usrfiles.com/ugd/dad90e_b5b3d1e4cc27438cb5162ecebace3712.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/ashrafia_nisab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/subnautica_deep_shroom.pdf
    • https://static.usrfiles.com/ugd/b8c837_374079b2775b4614b91333ce9e794495.pdf
    • https://static.usrfiles.com/ugd/b8c837_99f96d4bf13f4c5dacab2439f6dba3d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d88f92868a5f40da95dd08a4dac8d4ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc7fd14f55584cf981a041432a1bc95e.pdf
    • https://static.usrfiles.com/ugd/b8c837_23cbb0ad6bea40678c8891ef98565bb8.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_off00004a61.bin
8935c6281daa56c4b5f1f11e11c4162836b6901ed1afa8154f49e6403a11ec7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A61 5900 bytes
font_01_sfnt_off00005e4b.bin
028b51b28ca8fcbcbe700e5fe76d5098d957e860d4eaa657a7b3dcb9b67befff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 12032 bytes

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