Malicious PDF — malware analysis report

Static analysis result for SHA-256 298987c5baf32177…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 08:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628c850d1fa6d0a23eff40835814ae8a SHA-1: c6ba0597ae922d8ac0fb7c30eb3d83524078cd1c SHA-256: 298987c5baf32177e80831db4ef4e289d989e2ef93a34a02da8dae8e351b6e13
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 domain identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users with search engine optimization tactics. The primary malicious URL identified is https://ttraff.com/wix?keyword=ejercicios+para+completar+palabras+con+la+letra+d, which is likely used to redirect users to a malicious site.

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=ejercicios+para+completar+palabras+con+la+letra+d
    • https://static.usrfiles.com/ugd/314c35_7fe9c2de884d4f27997ec2d8bf733780.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5e51ed242c04b6d8d0ab4914e7d913f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0d9ea0f57004c04b51958ec8cf844ae.pdf
    • https://static.usrfiles.com/ugd/15ebe2_732c1a16cb9f405bb7bc3dbc489c4053.pdf
    • https://static.usrfiles.com/ugd/097bd5_12d9dd650c1145cc9ba4963752e6160a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fbe8aa1ddb442968027325f89fc08b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2db488a7fe6540bab5e45ad1efd8d673.pdf
    • https://static.usrfiles.com/ugd/0adedf_b10a4ca1de8c402fb159e967a177b659.pdf
    • https://static.usrfiles.com/ugd/c63dba_7d757319c01f4fa6a893982f222a2297.pdf
    • https://static.usrfiles.com/ugd/b8c837_7046c48c428e4ba9b66b01ef9ae738b3.pdf
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/92036855533.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/1435866034.pdf
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/background_color_clear_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/ncaa_13_teambuilder_website.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/earth_s_rotation_seasons_worksheet.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_off000061ca.bin
416481d2878b6f868b6696ae61491553f35c4d85180915b2d770d86cae7a58cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 5392 bytes
font_01_sfnt_off000073fb.bin
211c661999a921acc223a3362306bb14c3f6e6b6255dc5ec7aef169228bab22f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FB 11372 bytes

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