Malicious PDF — malware analysis report

Static analysis result for SHA-256 4633bf9a6c0b6a38…

MALICIOUS

PDF

51.4 KB Created: 2020-08-30 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ad0b9ee9fd29a0d8e775fa8d11158b1 SHA-1: 4d46e2f5f1fe675585cc37ba11efa385fc744bce SHA-256: 4633bf9a6c0b6a38cf5aeed2b2215ccb6577eaeae9280f4d860a94f45e678128
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure containing a large number of external PDF links, characteristic of a link farm. One of these links, https://ttraff.com/wix?keyword=mi%25E1%25BB%2585n+ph%25C3%25AD+ay+papi+v%25E1%25BA%25A5n+%25C4%2591%25E1%25BB%2581, is known to lead to malicious redirector infrastructure. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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=mi%25E1%25BB%2585n+ph%25C3%25AD+ay+papi+v%25E1%25BA%25A5n+%25C4%2591%25E1%25BB%2581
    • https://static.usrfiles.com/ugd/b88e3d_b71e213a3fef46c890af44a5d6a79f2f.pdf
    • https://static.usrfiles.com/ugd/05900a_6b3ccc27539c4cd891e3633456be6175.pdf
    • https://static.usrfiles.com/ugd/b8c837_c840536c587b45b294d99a09c57bb893.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4bf6b409ea74fed8cf0887e40321912.pdf
    • https://static.usrfiles.com/ugd/ae059d_9a7557b8b94848ea809359baa36f61c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ce0d02bfa7b458f835fcdb7f067e073.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_0e56dd497be5482c92fa29c1ae564b18.pdf
    • https://static.usrfiles.com/ugd/b8c837_404c24a989354ec29ef1d2ea9a374377.pdf
    • https://static.usrfiles.com/ugd/9cc572_84fdd7173cf248c9a337468cb5ffbb5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_32e17859efe84569b320a1a9966ec6cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed4ec8cc0a46436393c79e17a203478b.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_off000072f7.bin
8cae957823124d4f3cedf80e9d14fa276f2abcdc977d8c379f01add317222ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 5152 bytes
font_01_sfnt_off00008393.bin
618224e2a59bb5957326b4fc5240da1c2ee687020084248e9886fbb801eaef87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 21672 bytes
font_02_sfnt_off0000b0e5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E5 4324 bytes

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