Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a7bdae38ef0984…

MALICIOUS

PDF

41.5 KB Created: 2020-09-06 12:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99233aa9d8c2b8035a1fb77d4d4deb63 SHA-1: 6fd3af9f50e01fd02b0b5bd3eff0a2ffa985b0dd SHA-256: d0a7bdae38ef0984954afb4d0ee40c919c248ad5669e44d67590072e30bfede2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. One critical heuristic indicates a malicious redirector link to 'https://ttraff.link/wix?keyword=agathis+dammara+pdf'. The document body, though heavily obfuscated, contains this malicious URL, suggesting the primary intent is to lure the user to a malicious 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.link/wix?keyword=agathis+dammara+pdf
    • https://static.usrfiles.com/ugd/accd1f_78258774d2b943fbb178d04439cfb941.pdf
    • https://static.usrfiles.com/ugd/d7d6cd_7e6cb8be3af64689948f0961514b6c39.pdf
    • https://static.usrfiles.com/ugd/7dfe85_92cacd64a3cf4b6da82f01fd91b7d050.pdf
    • https://static.usrfiles.com/ugd/d90490_57fb4f23c7c14f02b6ad161ebccb950f.pdf
    • https://static.usrfiles.com/ugd/d99ef3_db600fc5235e43758db35584a49039db.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_00a11768da8f4ce5a831397158baf658.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wofizafadunemewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/vapuregupegaluvasuned.pdf
    • https://cdn.shopify.com/s/files/1/0432/2014/0191/files/73918492191.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/cd4052b_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/absence_seizure_treatment_guidelines.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_off0000646a.bin
ea460c3f42ab2c940dbc059550e827ed136da4367541d3c91be2f3d28cdce94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5412 bytes
font_01_sfnt_off000076aa.bin
fe381fda673581084ab8f6d17604d9de181baefcf178a0841ff658cb42239b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 10436 bytes

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