Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bfa334b0a13cc8…

MALICIOUS

PDF

38.0 KB Created: 2020-09-01 22:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822534ab966df3d8b39224e5e1d54cb9 SHA-1: d2392ba847665d7f5dccc4cee6a263aade45348f SHA-256: b8bfa334b0a13cc87a9bea8990a4790408f01d59dcee6ce89f0d3b85f42c9678
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, a technique often used to inflate search engine rankings or to direct users to malicious sites. One of the embedded URLs, https://ttraff.me/wix?keyword=celebrity+noun+form, is flagged as a malicious redirector. The document body contains garbled text but repeats the phrase 'Celebrity noun form' and includes the malicious URL, suggesting a lure to a potentially malicious website.

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=celebrity+noun+form
    • https://static.usrfiles.com/ugd/d7ba0f_80635e1b373e4cfa8a08532848d29af2.pdf
    • https://static.usrfiles.com/ugd/f84671_a5d03f6c57e24b06971b41a87056629c.pdf
    • https://static.usrfiles.com/ugd/eb6612_81209ff0c11f45d9aa6efdd07c9b1201.pdf
    • https://static.usrfiles.com/ugd/7ff653_83666340b35042eca041eeeea1f5fe4a.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_98f9154a8a1045119ccfd12d7c19115d.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/42884818212.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e4edeb7eac9486495861ed7cc940004.pdf
    • https://static.usrfiles.com/ugd/a64c8c_c45324d269174c2cb7ba205a135c988d.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/91158762405.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/rojevunedeme.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_off000056fb.bin
d5a67acbbd75cb84ecfc660a74d20fcf15fd40a4454444db54a435600cdf27c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 4672 bytes
font_01_sfnt_off000066d4.bin
f09aa8780d0bd8a506cde429ece7c12eff8812ab44ad3614aa586012165051cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 10368 bytes

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