Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d4b549a0699c95…

MALICIOUS

PDF

46.6 KB Created: 2020-09-06 18:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99a4450d2ce7792fbabb61310c572e86 SHA-1: d02664810c54ee9748cc9236140289f05e9236b3 SHA-256: 33d4b549a0699c95a89ebd092c8526c60452393541b8bb8160786ba96fe9f206
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, pointing to 'https://ttraff.me/wix?keyword=cetusplay+tv+remote+apk'. This indicates a social engineering attempt to trick the user into downloading potentially malicious content. The document body, though heavily obfuscated, also contains this URL and references to 'Cetusplay tv remote apk', reinforcing the lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to broaden the attack surface or manipulate search engine results.

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=cetusplay+tv+remote+apk
    • https://static.usrfiles.com/ugd/c836c3_b6e92adf58fa4d10902048ded6164b9a.pdf
    • https://static.usrfiles.com/ugd/136d3d_1d92a01687bb4e3991b3b03f2b57e80c.pdf
    • https://static.usrfiles.com/ugd/54dfea_c3f0b6ecb6744accb8dc4f71fd772d43.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/ocular_biometry.pdf
    • https://static.usrfiles.com/ugd/b85eb0_2b2e2485903441c9bd6ae273ab92bc68.pdf
    • https://static.usrfiles.com/ugd/7b00a0_3e2a4d5708b14d87a06a5c9f98b59f57.pdf
    • https://static.usrfiles.com/ugd/36d413_1600c26ea3fd484dbc6cff92e5446b43.pdf
    • https://static.usrfiles.com/ugd/d4df0f_50a2bff0afb7409e99095ea1590620f3.pdf
    • https://static.usrfiles.com/ugd/40b9e6_4c717928c8e14038ba741ec77e91bfa4.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/apocalypse_world_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/6366365530.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_off00005a6a.bin
3099e751664938ef85ce6e8c67e1a5cebfb8e6eb7da0ab167cdd78169ca7fae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6A 5096 bytes
font_01_sfnt_off00006bb6.bin
2b63d28f062316ebcc87835272d5d3353c357de0b5be0a86b9ae531d14e956d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 14704 bytes
font_02_sfnt_off000098f3.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F3 16060 bytes

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