Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7995d30b9367b8f…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 00:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b05ca8be04611e1b2820bcba3d34f970 SHA-1: 057c37d9a0bd1be27e4c892752369b7cee1cc9e4 SHA-256: d7995d30b9367b8f5592a0ce2d3d4f791d610a7c2e4cfe57181cc7672b670991
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, 'https://ttraff.cc/wix?keyword=food+wars+season+3+episode+24', which is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify domains, likely to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/wix?keyword=food+wars+season+3+episode+24
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/21612658721.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/lipevelobemitexibonemevul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/luzusibudavawikoduboru.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/275001531.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/temokad.pdf
    • https://static.usrfiles.com/ugd/e73fea_237e5c829fa5404d8147c63c84d6d82e.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/67022865117.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/eclipse_oxygen_4._7._3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_784ab9ff4f1f49e38983d04f34a910e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6a7acd930df4189b0463412e8d27f4b.pdf
    • https://static.usrfiles.com/ugd/fa6f14_e019679e749940b19ecd1551db315331.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_off00004d06.bin
1bde383c66d393b3b09c5661a43d415f6a1f0ca84150971b117299d5a9e25c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D06 4448 bytes
font_01_sfnt_off00005cc9.bin
66c53bc8d1ef8905c2e5cb05ba2f201fd19f6b28c5ca3b9c84ab98b2d691f207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 5352 bytes
font_02_sfnt_off00006f29.bin
00bb8659711e42685dc52fd46c4f3dec7dc13f6108010167d9424b33b54d6649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 10024 bytes

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