Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19400369d44b02e…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 10:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7dd1ffda1fb8a092795ddc7cc09ac2 SHA-1: 71481b3ae0078ac7477db35d9d573d7eea232a14 SHA-256: a19400369d44b02e241325da88dbc1c588313124d00ef3cdb7287394e232e041
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Minecraft ship blueprints', suggesting a lure to entice users to click the malicious link. The PDF also contains a large number of embedded links, many pointing to 'static.usrfiles.com', indicating a link farm strategy. 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.com/wix?keyword=minecraft+ship+blueprints+layer+by+layer
    • https://static.usrfiles.com/ugd/18f527_27d36e28b8e54fbba5e366b76663a9c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_30b71bfa4478426f97c1c0f33ffa93be.pdf
    • https://static.usrfiles.com/ugd/b8c837_867dfd62903a4df59efb9f9b30a9b231.pdf
    • https://static.usrfiles.com/ugd/b6edda_f14591bf66ca48ee99bf2a46d27bd58a.pdf
    • https://static.usrfiles.com/ugd/685707_c0bcfcf365ba42d2ab9430cb25d36773.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/zeginudewan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/66327892802.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/ceat_engine_5._6._1.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/medical_report_sample_for_heart_disease.pdf
    • https://static.usrfiles.com/ugd/a2d007_8f251ea1fbdf498abe10e7ccc8af4973.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d65f0bb7244ba693c62d5be9983a4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a1e20dd27f2416ea1efae8364f4157a.pdf
    • https://static.usrfiles.com/ugd/f8de3e_0092aafa0d864af1bb7a5caed8efe460.pdf
    • https://static.usrfiles.com/ugd/6d59ab_5a5ad987e3a64b1e95836fbaa6120666.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_off00006bfa.bin
e796f7ab7c7f80afd82bce50b34b1343f4e385e51eddaf1d26cd26eba3d5967f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 5352 bytes
font_01_sfnt_off00007e2a.bin
5038cdd02f5881565a088105b06ee6d7d260b04b1afb958b56b6448a8250d6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2A 9740 bytes

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