Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63e2bce40e484b5…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 20:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a363e577ce09db27fa5ce62be0d5b1d SHA-1: 403e918ca9aee9a8e5867ced3183f6b0fc0b1c64 SHA-256: a63e2bce40e484b590ed11cc59e16686e2144507ce43ff225bf58532733496c4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. One prominent link, https://ttraff.cc/pify?keyword=decision+tree+flowchart+template, is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a malicious redirector URL suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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.cc/pify?keyword=decision+tree+flowchart+template
    • http://lofagukiz.with-jill.com/uploads/1/3/2/6/132695454/ee406a92.pdf
    • http://files.boisdarcreations.com/uploads/1/3/0/7/130775987/menatejugofaf.pdf
    • http://files.pianistic-elegance.com/uploads/1/3/1/4/131483305/43624.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/muduforugugogedo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2049/9620/files/b_tech_subjects.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/nuwuxewokonejilena.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/waneroroteluweximetufese.pdf
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/52506388507.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/38942462501.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/zidifomisaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6362/files/civilization_iv_beyond_the_sword_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/34387806545.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/86233449832.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_off00006252.bin
cd1c1dc2067ce2e681620cbf5a472e7c70571ad61b5c163b932ab6bf31c5f841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 5348 bytes
font_01_sfnt_off00007463.bin
d95c14e9b572d718630ee36204753324a15081dfc820f61dd66236248818fd82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 10104 bytes

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