Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f424fdfa3cbde51…

MALICIOUS

PDF

39.2 KB Created: 2020-09-07 23:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8117b587edf90286f68d8291f91287cc SHA-1: 7d98ae0d168e6914a3fbd4057e6d9107eadd1c77 SHA-256: 4f424fdfa3cbde51d1136a791373639db95d19a51ad548795fe7db04555a6415
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'video editor app android free' and embeds a link to a known malicious redirector at 'https://ttraff.club/wix?keyword=video+editor+app+android+free'. This heuristic indicates the document's primary purpose is to redirect users to malicious sites. Additionally, the PDF was found to contain a mass external PDF link farm, further supporting its role as a distribution or redirection mechanism.

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/wix?keyword=video+editor+app+android+free
    • https://static.usrfiles.com/ugd/429b25_024ae9e1f8e847a79484b38a60fadcf7.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_8b4e768e7c5e46d0849d8650f959c398.pdf
    • https://static.usrfiles.com/ugd/c0b427_3eb9a8d741434285923475e01f4317d6.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/usps_exam_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/nowubokanumibijexo.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_d10134de3e42413caba42aa428101786.pdf
    • https://static.usrfiles.com/ugd/ef253e_74bc9b81848d4a16be8b45e89808dbf4.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_3afce0d46dd84b1f8b9736b3df26e32c.pdf
    • https://static.usrfiles.com/ugd/7d21c0_7b39cb6772604542882826358419f102.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_off00005ef3.bin
93dfb0c7cfc7d3fdd7dbf0f74f0f5677bf45a6e167a93300228d171f651a69bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 4788 bytes
font_01_sfnt_off00006f51.bin
4a5684bab1d59bfeb54f83a6c2956c038741d3d708f651793599be31f83ab1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F51 9664 bytes

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