Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4b2b4fc71eeb9a…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 13:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c229b96fa1b1ed36c36144c0de17d80d SHA-1: 0cd1dded2add73ee6770abbd333d179cbcd1972c SHA-256: 8e4b2b4fc71eeb9ab2309381fc89b83a3705da2b94c5ac9421cbe193985a45f6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL is https://ttraff.com/wix?keyword=maryland+fly+fishing+guides, which is flagged as malicious. This indicates a likely phishing or malware distribution attempt through a deceptive document.

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/wix?keyword=maryland+fly+fishing+guides
    • https://static.usrfiles.com/ugd/9cfd0a_b8f5c9c1325d45e49eee1bad114dc50e.pdf
    • https://static.usrfiles.com/ugd/b8c837_735c6288f6dc435e9ebd8326560b260d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b3e9e6523146d191ab8bd65508d732.pdf
    • https://static.usrfiles.com/ugd/837d34_4ca345e23e564cc2b14578808d012679.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb27de6cef0b4598afe0d75b800c6143.pdf
    • https://static.usrfiles.com/ugd/bd5c68_c659085df8b14699a7913d980522a26c.pdf
    • https://static.usrfiles.com/ugd/3be3a7_f1041ad4aa6b464488a5b47138c825a5.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/4_string_bass_guitar_chords_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/49824826530.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/journal_bearing_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/fejik.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/woxusunagujenuxojasakureg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/2005_chevy_cobalt_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/grouped_frequency_table_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/2008_dodge_avenger_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/rananefarofudosisegipaf.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_off00007d6e.bin
238818695699a7158d18acb8c29a5e190c769a6b05f8def295cb601523b82afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 5276 bytes
font_01_sfnt_off00008f6d.bin
83c3816fcd4bca6ce1efdc2e66fee5ddc00b865031a124ea5d349861eda0e9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6D 10196 bytes

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