Malicious PDF — malware analysis report

Static analysis result for SHA-256 556b58dd50246638…

MALICIOUS

PDF

41.7 KB Created: 2020-09-06 02:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b2eee79793259ce79490afc60ce543 SHA-1: 397f19e36cf49b7f2f7edbeefbe0e6686b152c89 SHA-256: 556b58dd50246638d088ee8835caff5a581b13daf481e7a7c4955fcb07eb830f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=jio+video+call++for+pc'. This URL is presented to the user as a download for 'Jio video call for pc'. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are benign but serve to obscure the malicious one. 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=jio+video+call++for+pc
    • https://static.usrfiles.com/ugd/f17c08_541c663fe7be4627824b3457cd15f8c6.pdf
    • https://static.usrfiles.com/ugd/d8966e_ec343ab0cbaa49d995c823a279a5ff1a.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_9d227520284b41b1a4a2e6aa4ac44561.pdf
    • https://static.usrfiles.com/ugd/82e28d_da9c5f682d404ce38f098b1c09e0bf0d.pdf
    • https://static.usrfiles.com/ugd/2b25e8_581feddc0066443ca1a67142f8ad43d6.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/biodata_format_for_marriage_free_download_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/72080259514.pdf
    • https://static.usrfiles.com/ugd/ced2dc_9eb1a39f4c544d0bba3a5466ee1f6e47.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2a928ca80a46f1a13767b78b44bd9d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/20544235540.pdf
    • https://cdn.shopify.com/s/files/1/0464/9022/2744/files/30146094213.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/42733159338.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_off00006694.bin
af15ceaeb0d578cdee447c856b4c5c6186d946a6358301517b39ba154e938b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 5020 bytes
font_01_sfnt_off000077c6.bin
05f662f46677091ec3d71d2208c8a7da2958551345bf19d7be4a899a2725cf7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 10128 bytes

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