Malicious PDF — malware analysis report

Static analysis result for SHA-256 9027b37485ce34d4…

MALICIOUS

PDF

48.6 KB Created: 2020-09-06 16:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdcd17d8801082c6759b6bd3c24140b5 SHA-1: ae1859dbfe3873587a6b93d9edc9b7a2ecff8243 SHA-256: 9027b37485ce34d4258a098e36852d2f2914e7ce5e7770911b536feda34b4253
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/wix?keyword=edakkad+battalion+06+song++masstamilan'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=edakkad+battalion+06+song++masstamilan
    • https://static.usrfiles.com/ugd/f4de5e_892a95d15549400c976003d0ffb8a632.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_69f57d6e7922415e829fb2d9cbd58734.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad8ec77c1d674a20b193146279898101.pdf
    • https://static.usrfiles.com/ugd/8ac1ab_44049ad1621b4e3786be85612d745100.pdf
    • https://static.usrfiles.com/ugd/94e5ef_7bb946843e064d9f93989513cfca5000.pdf
    • https://static.usrfiles.com/ugd/2486b5_dd7e35ad9eec460cb306b696af6eb883.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/37052489364.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/bocio_difuso_hipercaptante.pdf
    • https://cdn.shopify.com/s/files/1/0462/9073/1169/files/81783605002.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/76117802117.pdf
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/30118500933.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_off0000682d.bin
db272934f874c05fb3dc50e30a8fe85bcc1703ea0c9bc71023888024963f90c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682D 5176 bytes
font_01_sfnt_off000079ab.bin
078cf15aa1de5ea1ade88216e2bcf550575c4765cb31d2f3431b4c39492d670f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 14624 bytes
font_02_sfnt_off0000a7a8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A8 4324 bytes

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