Malicious PDF — malware analysis report

Static analysis result for SHA-256 def1b27214aac06d…

MALICIOUS

PDF

59.8 KB Created: 2020-08-10 09:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028c17486ed61564d78ed68676d4b0c2 SHA-1: ca2f1fae1f9536429aa25be05bd4542e0bb9c81c SHA-256: def1b27214aac06dbfd072fba63d1c0386ed3948779aecb240f799f78952cf8f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as information about lung cancer prevention. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is designed to lead users to further malicious content.

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=preven%25C3%25A7%25C3%25A3o+cancer+de+pulm%25C3%25A3o+pdf
    • http://files.nokilladvocacycenter.org/uploads/1/3/1/3/131379321/fodotivojinel.pdf
    • http://files.revmelodyann.com/uploads/1/3/1/6/131606186/748c6ac.pdf
    • http://files.kingschapelashford.com/uploads/1/3/0/9/130969386/xabikuwofabesu.pdf
    • http://files.thegrovecg.com/uploads/1/3/0/9/130968960/24c28b2e.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/ahimsa_azaleav_ephemera.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/pexaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/86518480099.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/83095974355.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/jodufigewuxulevag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/free_malwarebytes_keys.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/lonugiwefefapus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/fodovemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/19952333266.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/beyond_diet_program_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/dip_pen_calligraphy_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.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_off0000a686.bin
be4935ff98a8eda30272980b6fea09dee27c3e4571ca6d5a832d446e1b09a7d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA686 5684 bytes
font_01_sfnt_off0000b8fd.bin
fca3c7b2a565899877f1094d7e542c65d462de5170f81d85fba9065570ce3dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FD 12992 bytes

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