Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc00279a4336b93…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 03:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f1040d06dbce829dec60f80a3962f3 SHA-1: 5093b7aed04985e0a0145051c9cc21964f9d8d18 SHA-256: cdc00279a4336b9356a5c31237977dd0e312be1aadbc00a75dcb6889af52d36e
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous external links, one of which is a redirector to 'ttraff.club'. The document body contains the text 'Download from echhi iwara' and the malicious URL, suggesting a lure to a potentially harmful 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.club/wix?keyword=download+from+echhi+iwara
    • https://static.usrfiles.com/ugd/d775a9_e7098f7548954c5eae557164beefa0a3.pdf
    • https://static.usrfiles.com/ugd/c83fdb_8cc5c9e29ae844fc8a7bb408fe54d6e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aeafbef4f54d0883ca3820e25ac78c.pdf
    • https://static.usrfiles.com/ugd/de60da_63ce26d120bd49f6bc0b27832e7c45b7.pdf
    • https://static.usrfiles.com/ugd/23b571_5343944c75124733b17d90cdafe9d496.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/recurrent_calcium_oxalate_stone_formation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/2017_inspection_dashboard_analyse_school_performance_data.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/87486416780.pdf
    • https://static.usrfiles.com/ugd/1f5cef_4cf6a352e77b408d8b5ed93f13bcfd4a.pdf
    • https://static.usrfiles.com/ugd/3b47cb_90e6b9d64fa447769bd6b263700a487f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8642fb330a784758b48b2f0409f352f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_68e2dc9261bb40a9a60e40b5ca68ed52.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_off00005f7a.bin
b31194a5860d7808573570b1f92792610cc8a1220c45a7e6784cc2b502af2745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 5172 bytes
font_01_sfnt_off000070fa.bin
b8169a641c4d2ffe646e74e1abec2060c27131bb0164e46d2101521a5ab01fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 15208 bytes

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