Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02a0416497cbdfc…

MALICIOUS

PDF

39.5 KB Created: 2020-09-17 10:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44537eb2af52ba4a20facca1f2debd2 SHA-1: 3501e691c0d1d43825dc5243632fdbf45ede7a43 SHA-256: e02a0416497cbdfc1f59d40b5a5fbe5aca9fe36ad51e30283d8ca55695f040a8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, such as https://ttraff.link/wix?keyword=gao+nep+gao+te+tap+104 and http://punofo.jagnq.com/uploads/1/3/1/8/131857114/dexexubi_dudunixusekujo_kegerazaxem_berafagedodatov.pdf, are likely used to lure victims to phishing sites or download further malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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.link/wix?keyword=gao+nep+gao+te+tap+104
    • http://punofo.jagnq.com/uploads/1/3/1/8/131857114/dexexubi_dudunixusekujo_kegerazaxem_berafagedodatov.pdf
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdf
    • http://momofewe.dahliaacresfarms.com/uploads/1/3/0/7/130738893/gagorexilimonojadux.pdf
    • https://bd805b48-151a-4480-9d60-51ebfcf93eb3.filesusr.com/ugd/0df15e_ba99d49b48f547dfb9285534b26d5ad6.pdf?index=true
    • https://b502c5ad-4c20-4aa5-a0ea-f65742d2ba11.filesusr.com/ugd/d5415a_97c8957e27054152851808a22f6001ae.pdf?index=true
    • https://c3337710-f89b-4c8c-8dad-6ea3fd208034.filesusr.com/ugd/93971e_51efdea0e5a44551819ee2096a4e8f2e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/php_mongo_find.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/96266364980.pdf
    • https://cdn.shopify.com/s/files/1/0432/9281/9616/files/yamcha_dragon_ball_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/42439867946.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/siposuxijukidanawuvotov.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_off00004e74.bin
2dc5b9d36e2996312bd0cbb52b9f7d7d9f5f7b97efd6bbc9e49636fa1a1c6662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E74 4732 bytes
font_01_sfnt_off00005ea3.bin
dbab78c703d9177eec03e902e7b784c050ea25675c9194e4d065142cc6f7f3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 12480 bytes
font_02_sfnt_off000083d5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 4324 bytes

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