Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad28e5302f2c1b5b…

MALICIOUS

PDF

41.7 KB Created: 2020-09-11 05:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038f4fa0991d3c8b2e9206aef3451be4 SHA-1: b2afe1b03f4bf1a4e71ce2cd80cb3cdf31ca9aa9 SHA-256: ad28e5302f2c1b5b0712edf6cfe06f68557614e96a8d218d117f630fffb6a5da
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.me, which is used in conjunction with keywords suggesting a lure for educational content. This indicates a phishing attempt designed to redirect users to potentially harmful sites.

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.me/wix?keyword=singular+and+plural+nouns+in+sentences+worksheets
    • https://cdn.shopify.com/s/files/1/0438/9342/4283/files/18581875590.pdf
    • https://cdn.shopify.com/s/files/1/0461/7096/4131/files/kisofusaxaxirizesijive.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/apache_spark_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0428/1591/4151/files/43991507911.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/pdf_to_word_nitro.pdf
    • https://static.usrfiles.com/ugd/800b88_931a6173f7534b5cb5e98d86f53eddac.pdf
    • https://static.usrfiles.com/ugd/2f07a1_5a898d00501f4991ab116bf1f74567ed.pdf
    • https://static.usrfiles.com/ugd/68ec51_d2510c85a72c44e1a5d37cc16764cb22.pdf
    • https://static.usrfiles.com/ugd/08e331_5ec88872f1714913889fa5be2bc6b18b.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_b863dc0eacad497fbf6a7578039a2541.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_e41cc036b3bf45ff90adc067b838c9e7.pdf
    • https://static.usrfiles.com/ugd/dcf311_16095e1453814de187757a78d707c2a6.pdf
    • https://static.usrfiles.com/ugd/1acd69_6a75338431754aeeaf64058025caadf8.pdf
    • https://static.usrfiles.com/ugd/cc14e4_0d22dfb796d74770bdb1e620c4315b02.pdf
    • https://static.usrfiles.com/ugd/90c678_ec970549d26e4d0bad70be73dc17533e.pdf
    • https://static.usrfiles.com/ugd/80fd5d_64f63457b57f4052ba8e11c56858eba7.pdf
    • https://static.usrfiles.com/ugd/756799_47adfde505c346b19cdb0063bf2f9a3f.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_off000063e8.bin
bf3ef3630fdfcccbf95f4715f66aa7ef874d722c119d47782c78b7cacbeae91a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5592 bytes
font_01_sfnt_off000076fa.bin
ac848942f640aedf4c27d896822928969a60950d9e08712291e850492beda757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 9936 bytes

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