Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ae5539c09753e7…

MALICIOUS

PDF

53.2 KB Created: 2020-08-30 06:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6677eaabc7830ebd29cab2ca8d6bc20e SHA-1: ea37c64feb3ce8724331d5d5e60d19ea4395adba SHA-256: 98ae5539c09753e7f1d9dac053f948bd91c5f348f9067f2308e8cef47c2f14fe
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/wix?keyword=la+historia+de+narciso', points to a known malicious redirector. The document body itself is largely unreadable binary data, but the presence of the link farm and the redirector strongly suggests a malicious intent, likely related to SEO manipulation or redirecting users to malicious sites.

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.cc/wix?keyword=la+historia+de+narciso
    • https://static.usrfiles.com/ugd/b8c837_1a70e473ec2e4c9f988ece322f06285d.pdf
    • https://static.usrfiles.com/ugd/dc98cc_7e24ff9f1c674294ba4cf4d903446cbf.pdf
    • https://static.usrfiles.com/ugd/80c1db_c069d2aa193541fabda2a1a826e763cd.pdf
    • https://static.usrfiles.com/ugd/3fc21f_947b56e8a1d14154b8c4920ae5665893.pdf
    • https://static.usrfiles.com/ugd/d162e3_f66bbf1cfd4d43d88717b560963a2962.pdf
    • https://static.usrfiles.com/ugd/8cbfce_7ccc05d324be4a51bce7a1bb1fdf1fe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_dde70369469c45649912935e0d5e8786.pdf
    • https://static.usrfiles.com/ugd/e1d12c_98f96102387348a3adb54d2dcb57b7a4.pdf
    • https://static.usrfiles.com/ugd/b52961_e5f085b7f3cb42d486652c17ae4ec482.pdf
    • https://static.usrfiles.com/ugd/b13fd1_4f1c2bd0045c40b8b75d877335cbab3a.pdf
    • https://static.usrfiles.com/ugd/49be48_5122762e2a4b4c6081700fff5497f7d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3fe03b5f37441ef8720a6ec74cb2d99.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_off00009077.bin
5ca390eb763e1fec074dbb7205c990e8e20a8dc33ff17ee3accc216ba93fa700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9077 4936 bytes
font_01_sfnt_off0000a135.bin
c389296fccac5cf21a7fef600a6a14401fc08fc9823becf0199146ee8bc8fba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA135 11512 bytes

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