Malicious PDF — malware analysis report

Static analysis result for SHA-256 443d76309a2ecf71…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 20:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96dcafae89b3fa834cb5ebfc5e9424f3 SHA-1: 9878e0a5e2c5d959c352b50fe909eebf4db71070 SHA-256: 443d76309a2ecf71e6ac014b810d08470dc682bb5e3eadcd83b3cda282809228
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=manual%20transmission%20rebuild%20shop', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=manual%20transmission%20rebuild%20shop
    • http://files.chillstonehouse.co.uk/uploads/1/3/1/8/131856743/fuvatebon-rigopikovu-zigasomuropobil.pdf
    • http://files.babeliciousandthebeard.com/uploads/1/3/0/8/130814085/4557887.pdf
    • http://fukuz.dunwoodyoakslennoxlakehoa.com/uploads/1/3/0/9/130969723/sodujutova.pdf
    • http://files.adriancc.org/uploads/1/3/1/6/131637679/javiben.pdf
    • http://files.joyanddaisies.com/uploads/1/3/1/4/131437949/litik-fevutivadip-polomog-sipofere.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/vojejegupupeninen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/terjemah_maulid_barzanji.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/7475756187.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/60188125930.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/9898064454.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/63121036097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/60688926898.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/construction_scope_of_work_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/jabatogeveroxupapasapesod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/jasamezagojovutokojure.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/substitution_and_elimination_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/zerojanemadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/kukenepadobelegud.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_off00006762.bin
34d3077aed4a6791a03c6651efbc9d13c50a3eb68b9cac99e75c0708ce0cee44
pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 5344 bytes
font_01_sfnt_off00007953.bin
c266256b29eea7c91763cb9c314230989f6bd00ae2e18853d8b000ad7a5ddded
pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10220 bytes