Malicious PDF — malware analysis report

Static analysis result for SHA-256 214245e406150f54…

MALICIOUS

PDF

37.0 KB Created: 2020-09-19 03:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a1ff59e80646ead37cb976ba903fa61 SHA-1: 3bd93fbac4521e4db437649b7e1f9ceb5b013be6 SHA-256: 214245e406150f542a3b278100b3d819e18bcd3c442daff9dbb06f62e00ef43e
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=right+triangle+geometry+worksheet', which is likely intended to deceive the user into clicking it. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=right+triangle+geometry+worksheet
    • http://fatev.hirchert.com/uploads/1/3/0/8/130814687/gukekebat.pdf
    • http://files.autumnbeckman.com/uploads/1/3/1/6/131636654/pajowanun_dulozepadez_jubonuwegivofan.pdf
    • http://files.dlaaero.com/uploads/1/3/0/7/130740517/8166684.pdf
    • https://c0e134fb-7da1-46c5-b452-7ca01efc9b42.filesusr.com/ugd/f6a907_7b6c2696099b4e04b5f150715fb1bcf0.pdf?index=true
    • https://6b2521ec-14c4-4ad3-a173-b191432fea94.filesusr.com/ugd/008a9f_23e3eafb55104b208c8855bf1897b576.pdf?index=true
    • https://097b26e7-2758-459c-bc46-a025944622c0.filesusr.com/ugd/e4d7df_1d75af9b01d44e26849dfcc4178c9820.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/41235101844.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/93724075252.pdf
    • https://aa498fb3-4066-45a7-b141-b768f25834c8.filesusr.com/ugd/84a5c6_2d7fbce060304ddf88b93cfcc06a3ae8.pdf?index=true
    • https://9c8d5784-8d97-439e-825d-60c533e72df6.filesusr.com/ugd/eda9ba_2e4a8f0bf27d44beb5c51c830eb3941f.pdf?index=true
    • 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_off000051ea.bin
cd142016f48ba77a492c7086e8cae817562ce1c6e91827fab3b0522099494d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EA 5364 bytes
font_01_sfnt_off00006419.bin
20d87ebcecfd87eaea5bbbfeb31ff1705523dcd8412318eddaeb349fadb66472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 10500 bytes

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