Malicious PDF — malware analysis report

Static analysis result for SHA-256 d007e6ae28435237…

MALICIOUS

PDF

42.2 KB Created: 2020-09-03 22:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f5158a1f7f5221105e177d415dd3461 SHA-1: 337905dee0bf504a7ce7183b6e1cad411bc46370 SHA-256: d007e6ae284352379d5d039a4cd85ab7a3fde514f0bef410bcab38608131dc8c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, disguised as 'Punctuation exercises for grade 2 pdf', redirects to a malicious URL on ttraff.club. This suggests a social engineering attack aimed at tricking users into visiting a malicious site, likely for further exploitation or credential harvesting.

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=punctuation+exercises+for+grade+2+pdf
    • https://static.usrfiles.com/ugd/b58d21_9394fdd4b92044da9cbe95e8f6bdb79d.pdf
    • https://static.usrfiles.com/ugd/b28561_15b34f3602864a379f383a406cebfdb3.pdf
    • https://static.usrfiles.com/ugd/a838c0_70c8c8f46abc43d987f9a8796ce882a4.pdf
    • https://static.usrfiles.com/ugd/bf650e_19f049fad0d04a69a7cb90c55ac5c9ee.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/barry_callebaut_annual_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/59515923476.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/programa_de_aprendizajes_clave_primer_grado.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/branches_of_chemistry.pdf
    • https://static.usrfiles.com/ugd/234f58_c734ae92784043f380c7eae980ca9af3.pdf
    • https://static.usrfiles.com/ugd/1cc777_e765da0f28534b1cbf478510dbf9dcc0.pdf
    • https://static.usrfiles.com/ugd/39cb9d_11f78688136744588ed4bbc5d74ca084.pdf
    • https://static.usrfiles.com/ugd/122077_e43ee70b7a104a2a92dd5e623a8ccd50.pdf
    • https://static.usrfiles.com/ugd/7f614e_407289b1a9b5485b9702f6bb30f8d0d0.pdf
    • https://static.usrfiles.com/ugd/7dd30d_b4a444e11a9d46d5b73e3c1189097953.pdf
    • https://static.usrfiles.com/ugd/de3d83_f342efcbbd474e54b27829bef9754e57.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad32f1790ac84b249115abf8fa40ad1a.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_b2ddbfff785d41d1b00f763d7e1210f5.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_off0000648a.bin
9c719cf3d9cc5297dfe65e032d37bdd82ab07e18c1233f34fb0308c0b982dcb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 5492 bytes
font_01_sfnt_off00007757.bin
74a46ff0f068ce2db79aeaf2deccd591897cfedea128ca840d17a6f0e9fb4922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 11104 bytes

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