Malicious PDF — malware analysis report

Static analysis result for SHA-256 f607562c440b4f31…

MALICIOUS

PDF

42.3 KB Created: 2020-09-07 02:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 059572a52bf60a0e0347ef60a4ccb4d0 SHA-1: 956b464e70aefc3fbbdd68b514b5126aeafcbc5e SHA-256: f607562c440b4f3190feaa29dcdc5129e6d26c191beb31fa767b27f47b8eec11
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, indicative of an SEO spam or phishing campaign. The embedded URL points to a redirector service, which is a common technique for distributing malware or leading users to phishing sites. The document body, though heavily obfuscated, contains the same redirector URL.

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.club/pify?keyword=android+games+with+good+graphics
    • https://static.usrfiles.com/ugd/f1d680_dc0d67169ab24e15a2561a47265877ee.pdf
    • https://static.usrfiles.com/ugd/a8cc01_0d627a22ec4f4d07bc8f4f4cc2d2add0.pdf
    • https://static.usrfiles.com/ugd/6c313a_baa949ad416b448a89b6afbc9b5ed6b8.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/musculo_tercer_peroneo.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bccd6a9c70c48b3ae72f07ad2df43aa.pdf
    • https://static.usrfiles.com/ugd/681527_5d0eeb66037b4967987e66366e51ebba.pdf
    • https://static.usrfiles.com/ugd/221f3a_8d03388fb3d34a5caeab7679b11e8e81.pdf
    • https://static.usrfiles.com/ugd/a2de88_7eb3887f6ab1441989be0c05568e0a02.pdf
    • https://static.usrfiles.com/ugd/2b3f46_7c1470965000424cadc7807963c40dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e9cb0a2e9c485fb7883d8ff08fdfe1.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_off000065af.bin
70f86827df3834f3aebc4bca267ab59d316c2bec4d6a4766723eb639e8dd8103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 5536 bytes
font_01_sfnt_off0000786c.bin
0e045c999098f0d1d86c0c54990837e997d9b3cebea37c2b7f3e506aebcf8d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786C 10876 bytes

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