Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4f312276eeed8a…

MALICIOUS

PDF

48.5 KB Created: 2020-08-29 17:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b96fa40981e95334279f6ee566c18281 SHA-1: 6e9daaf7216bbfac971f2dfffef5907ee98094a8 SHA-256: 7a4f312276eeed8a526b6659f0a60f4a2e638c4bbafd497540d37918140087f9
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying a link to known malicious redirector infrastructure. Additionally, the PDF contains a large number of external links, suggesting it is part of a link farm designed to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL, which is likely the first step in a phishing or malware delivery chain.

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=so+b+it+pdf
    • https://static.usrfiles.com/ugd/b8c837_99629299280b4f74b9c96dbba9db3d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cb973119c11473c929f99e9e82a0979.pdf
    • https://static.usrfiles.com/ugd/b8c837_35847d17ca634e0f92ce52dfb6e6f35f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0f4b80d85d444b39ac73b639e11c68e.pdf
    • https://static.usrfiles.com/ugd/0a593f_33409430a650401ca3015ccfd3a0db82.pdf
    • https://static.usrfiles.com/ugd/b8c837_7093ddc8f9744b2aac5c360e0eaceeec.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9df642da5774e1194a80f0934fb8a8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_61462ffe63534f3cb1f39665c46fd009.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/zilazexazefovoderu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/cover_page_template_for_report_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/cicerone_beer_server_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/banking_and_financial_services_act.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/41359485218.pdf
    • https://static.usrfiles.com/ugd/1decf9_0f600a63e80e4c1cab05b23bdeb39d27.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19415cbbbb84587b00bd428bcd33622.pdf
    • https://static.usrfiles.com/ugd/b8c837_263d4133e17c4f9e95aaa360348159d3.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_57604c39516045efa782614ce9dfc0ce.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e4.bin
40087c3af96c1a602294d41cdcc39047b449ae1ab5041e3fcfb84f44697fc006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 4764 bytes
font_01_sfnt_off0000741e.bin
a685516edea4a50178490b7b4b05e6d4a866d4131c35ca76c4c39d06c3ec2f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741E 2476 bytes
font_02_sfnt_off00007eeb.bin
5abdf685710eb6c1668a565a2a07735eed12636ae1a3ab75297efc78f60781a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEB 6652 bytes
font_03_sfnt_off000090b6.bin
adc61209f5dcadd45425e9e0333dd2b4775627b7995527466ad7eb86a73bc81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B6 10500 bytes

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