Malicious PDF — malware analysis report

Static analysis result for SHA-256 229cf8e298f9278d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 16:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a77a500aad227a9c15f462ae507071 SHA-1: 7b578073136dacdc9ec5b4b95adfc37d30c9d443 SHA-256: 229cf8e298f9278d97ec3c122bb4b7368488dfa88351bf9c299f20f9d32d0c77
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=column+addition+worksheets+carrying', which is also listed as a malicious redirector. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.cc/pify?keyword=column+addition+worksheets+carrying
    • http://kelezu.jasminehearn.com/uploads/1/3/1/0/131069806/gumezategozili.pdf
    • http://bimogugin.tomfoolerytoys.com/uploads/1/3/1/3/131379578/vojedefebulofajuru.pdf
    • http://files.darranparkprimary.com/uploads/1/3/2/3/132303151/koxiravasom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/basic_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/17179300.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/course_amadeus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/cbr_test_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/7523599210.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/kixomumid.pdf
    • https://cdn.shopify.com/s/files/1/0439/2416/0667/files/pofumusasefuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/kijutexuzomol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/45046436272.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7289/files/ignou_assignment_solved_2020.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_off000060e4.bin
656af635bf72586155724c756b9d0ae2cba09774e1bbfe28a77524b231c6be73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5516 bytes
font_01_sfnt_off0000738d.bin
b67007c03465e76ead4625c08ea1137223772a916420247c33bdb7017f9f58db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 10132 bytes

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