Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6994cd45518b75…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 18:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c9833d6a65f841cbe14e582bdf67dc SHA-1: 5a3d49e33a87c95a6997ca0a273a53e6e804ebb6 SHA-256: ad6994cd45518b75c1149ca72ee6e6fd6d97c64a15fe9f75deb415cfc7032efa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=manual+on+transmission+line+towers'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking URLs, likely part of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=manual+on+transmission+line+towers
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/217d68_debc17038e754c0894025e3f5ed0bd2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_99a05ef4693a485eabdb5b46b23183fa.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_25f328b746aa42128adb5bac1a1d7bad.pdf
    • https://static.usrfiles.com/ugd/b8c837_beaf0f4ae0944100b8047c300d0beb16.pdf
    • https://static.usrfiles.com/ugd/b8c837_00f6da6b9eb74805bdcb834ec91d1cc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_81f7a9d0b08a4f23aefb4664121db55e.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/diseraguvuzugasadufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/octopus_64_bit_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/dezegujotezunurokewezikad.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/58461577200.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c28dc513ed642649e4fd31ea949c8be.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9c380340e674d38b7994a786f2529dd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070e0.bin
e583acbadc00ebdc7a0585e5932fcb79b00cbaa070a2365c29fdd2404a21a8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 4808 bytes
font_01_sfnt_off00008128.bin
00c4dcb900291c3953f72ca4d40b47823d599fa141fd0dd54bf80f8ad9f9ccc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8128 9848 bytes
font_02_sfnt_off0000a2ed.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2ED 4324 bytes

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