Malicious PDF — malware analysis report

Static analysis result for SHA-256 474f2b20a53e02be…

MALICIOUS

PDF

47.4 KB Created: 2020-09-01 09:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011d4afb9b0ecff62b6ae2d95a2fa326 SHA-1: cebc6b7ae6bfdae21175f4c8548b037c9d132ddc SHA-256: 474f2b20a53e02bef65f0a12a15a1ed04fb1358ac608f5ef60d8127d97283ea3
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure, specifically 'ttraff.com', which is used in conjunction with a keyword related to school uniforms. The document body, though heavily obfuscated, contains references to the same malicious URL and a benign-looking PDF URL, suggesting a lure to a potentially harmful site.

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=aldenham+senior+school+uniform
    • https://static.usrfiles.com/ugd/45e30f_412c223e80e94d52849db167b6fd8e5e.pdf
    • https://static.usrfiles.com/ugd/930050_68a438d9150641b7b09c8ea911c73f1d.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_0e1093b9c5e04340bac2bbfad2727a86.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/fiteviwozifuvoxikux.pdf
    • https://static.usrfiles.com/ugd/bb13a2_bf99663aa36d4508a5516c8e3e534ca2.pdf
    • https://static.usrfiles.com/ugd/d4579c_d3d9689e3f4d4eb4a56caf9e8bb2d44e.pdf
    • https://static.usrfiles.com/ugd/54fa57_3739e14d4c9a4508a7ea61125fa0f259.pdf
    • https://static.usrfiles.com/ugd/b8c837_26c3e83b4aef41f0947e035d62804491.pdf
    • https://static.usrfiles.com/ugd/e2f197_330bbb3c9f8b474a86ed5c0ed453c49b.pdf
    • https://static.usrfiles.com/ugd/2e16aa_5369b2969ff14b78a6e964ac116e0a9e.pdf
    • https://static.usrfiles.com/ugd/a4d998_c914494806954f2ebafd64239b19a625.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_off00007c09.bin
5d522075697badc5e5289665cc71f6cf0cb1eed949ed4b61959df1e6a5906679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C09 5248 bytes
font_01_sfnt_off00008db2.bin
a25d80ce89ba6c3dbc1245cbb0462601af214067b7737e5ac044befcddd17ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 10476 bytes

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