Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5eb6e8c7ba2dbf9…

MALICIOUS

PDF

111.7 KB Created: 2020-09-08 13:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4b0695148f07c8cc76382e991655050 SHA-1: e3098ebd8b75105558fb925226882ab5aff7a732 SHA-256: b5eb6e8c7ba2dbf9dbe8ab9243ecc438fcf68427363c43e7f43dc14a48b271e3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a document about 'Energia eólica como funciona'. The PDF also hosts a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/pify?keyword=energia+e%25C3%25B3lica+como+funciona+pdf
    • https://static.usrfiles.com/ugd/e3c460_36889ccc771240b98b4f00a1bb96bb8e.pdf
    • https://static.usrfiles.com/ugd/efc97f_ae714cfbcd024e4a83e25f572f4eb09a.pdf
    • https://static.usrfiles.com/ugd/913720_e2a67e5e9d874050983af04aab479c94.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_4b4727eb4e22482b9b45226d2e74bf06.pdf
    • https://static.usrfiles.com/ugd/af0aa9_02e752062dde4263867c65972857c5c4.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_08a4d2286c494812ba7f23fd176ea58c.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/digital_electronics_interview_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/33587966691.pdf
    • https://cdn.shopify.com/s/files/1/0461/9013/3406/files/como_hacer_un_render_en_sketchup.pdf
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/21413114386.pdf
    • https://static.usrfiles.com/ugd/f08e01_3f30da8c33a44ce5a1e3b396b4fa3758.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5a9a028e0b644cd8d98e93a5652333a.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_off0001670d.bin
f9064d5e7049eaf360d14804d13077e408af4e34e344d21452bc78895dc85cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1670D 5392 bytes
font_01_sfnt_off00017915.bin
9aab293eb41aafbcb51479c2fc3fc4d50db3bf2569013538f992b40e698d5516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17915 18676 bytes

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