Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adcd643d8496f62…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 12:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa006b5acf73270217593ab08cb516dc SHA-1: 62439be6a81ed9f32190ccde3e2e372b0a172eaa SHA-256: 2adcd643d8496f627e8c4a3b4f5de3549872d9c3bed083d5732e361650d085ca
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references a PDF, suggesting a lure. The presence of numerous links to static.usrfiles.com, while labelled benign, indicates a link farm strategy. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

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=american+speak+out+pdf
    • https://static.usrfiles.com/ugd/b5472a_3d9759edc64b4f30921304e537dd35c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b7d39b72a64b3a9ebd791606d268f6.pdf
    • https://static.usrfiles.com/ugd/c345b0_540fb5f296a24d3d9c78150403134463.pdf
    • https://static.usrfiles.com/ugd/3eed2b_ac148d9f2e9948b699d269f06ff4ccd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_042bcdc01125418b8b193e4ea30b423a.pdf
    • https://static.usrfiles.com/ugd/469aea_ec1e4da405af47e68ca512bca49e4e50.pdf
    • https://static.usrfiles.com/ugd/b8c837_90b894dfaf584e44b82e71d2bf24d862.pdf
    • https://static.usrfiles.com/ugd/b8c837_94654a8b021846d6a31af0396024b847.pdf
    • https://static.usrfiles.com/ugd/b8c837_98b8e68f9a124837b2e32dd7f6625552.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5175/files/lorapolazifuvubusif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/eighth_amendment_to_the_constitution_of_pakistan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005439.bin
f49c39415a18da43f7104687a0b84dcb8a3f0e15feef3ade58a30c0b7c7aeb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5439 5204 bytes
font_01_sfnt_off000065c8.bin
9b10ca17b97c9470bb63a21b738ebca45252d8cc71435aa54acf46e7630729ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 10168 bytes
font_02_sfnt_off00008867.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 4324 bytes

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