Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2ce82de234c26e…

MALICIOUS

PDF

37.3 KB Created: 2020-09-01 11:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ec5f16f216a1c3c7493f152b4316b8 SHA-1: b2b79548f5f2206070efd03ee563ca16c9c4ca00 SHA-256: 2a2ce82de234c26e40e1ac8d7bf076116c0b063f3262588aed89285b36a01a08
150 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to mimic search engine results, directing users to a malicious redirector. The primary lure appears to be related to 'Permatex gasket maker msds sheets', suggesting a phishing attempt to trick users into visiting a potentially harmful site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=permatex+gasket+maker+msds+sheets
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/najugetidasopetibawiligu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/28937652883.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/63132841213.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/68432847744.pdf
    • https://static.usrfiles.com/ugd/227d0f_795181be83c34b4f87ceea95159f183e.pdf
    • https://static.usrfiles.com/ugd/b8c837_95c02251716544b8ba687ac2450d4888.pdf
    • https://static.usrfiles.com/ugd/eaf48f_4f9b46915aa0481dbddc28bb9c0a52f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bcff15cfa1c4370b1d950ab64693aab.pdf
    • https://static.usrfiles.com/ugd/278743_c1c528cc7c8941ba88d57a0835db26a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc22890e19354a8c95a814f9dc2f3ac0.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_off000053c7.bin
0612a43338ed33b3661a9ed30636d7d589263fe7d084b64a88ec08968469fa1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C7 5340 bytes
font_01_sfnt_off000065c8.bin
465e0cbe3abdd9fe647703a941dc7af78b98817131e4f62ccb1cba9fef63c9a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 10244 bytes

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