Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd1bd0bd6f89d87…

MALICIOUS

PDF

57.0 KB Created: 2020-08-15 03:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b66d4924bc83f565a4471cf1d212c4f6 SHA-1: d31ade538db5f7ce4759f7f49637c72322e97fd6 SHA-256: 9bd1bd0bd6f89d87860f58da4e26837f5e0f02f922b9075a8f6e53d792972887
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that is disguised as a free app landing page template. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links.

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=foxy-+app-+landing-+page-+template+free
    • http://bozujazo.mudgeeyogacentre.com/uploads/1/3/1/8/131856185/relitupepafag.pdf
    • http://files.tonestencilart.com/uploads/1/3/1/3/131398010/7887303.pdf
    • http://files.edwardcooperrealty.com/uploads/1/3/1/3/131380511/filise.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/pivanokodavabigija.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/3589602959.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/estados_financieros_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0437/0871/1080/files/jetikelagabuguzefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/11966073343.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/69241029407.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/zivib.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/dunevamivemuzexojadidika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/belzona_1221.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_off0000a0fc.bin
c236198666ec91f92af1ee6a012fae2a65ca74d86ae75f8727f3ff1a4ed66df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FC 5340 bytes
font_01_sfnt_off0000b32b.bin
c98ea951fd50b7e788cb8a31586c27ae08879b58b552a6b7792cebc3a9dd9b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB32B 10480 bytes

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