Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccf88ae27693e30…

MALICIOUS

PDF

45.7 KB Created: 2020-09-04 01:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f575604da32eb34b5f1e25436bb52e SHA-1: 6abc33db9f252bc56cabc143a6279231929d6f93 SHA-256: 4ccf88ae27693e30b3eb11b7ee357ffb2c526b861af087b0f2cb0153b9afc97d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect users to a phishing or malware distribution site.

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/pify?keyword=arduino+uno+adc+data+sheet
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/pulapefiroli.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/ascii_to_binary.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/29625303656.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/44662183779.pdf
    • https://static.usrfiles.com/ugd/e4ee87_b517fcc142084a968e04a40d7e4d48ce.pdf
    • https://static.usrfiles.com/ugd/027f51_2d4c9b6e57514d14b546a5007d6bf84b.pdf
    • https://static.usrfiles.com/ugd/f84671_d290351baa2c43b4857dca48ccfc8296.pdf
    • https://static.usrfiles.com/ugd/a4e402_cc05cecad117464a9598ff3292c1bc02.pdf
    • https://static.usrfiles.com/ugd/fb83f1_251158039cc745c8b0b378ac4e22fe9b.pdf
    • https://static.usrfiles.com/ugd/cbe325_8a3b60b74623439bb301b37bc5d3b5d2.pdf
    • https://static.usrfiles.com/ugd/eaf48f_9fe5af8ddca74c9ca5ccec98f2d32ca9.pdf
    • https://static.usrfiles.com/ugd/c63dba_2fdad94b3f294418a01ed94ecec27b89.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e5dbee264b4189aa6fe418169d5cbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f68eb444f0f46489efea14ce3ee0019.pdf
    • https://static.usrfiles.com/ugd/89c6ad_6c256e7ecd84475281f0522594669bb7.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_off000076ea.bin
b19b5fe0ec3fc03e22f9b32c435662b6af0f0f610766d8a88d4bfe11f574d131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 4984 bytes
font_01_sfnt_off000087d1.bin
b34f21318332658c4a495e8d6091281a9399c93b40d904acf1ea69ea9742bc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D1 9900 bytes

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