Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b66fc1ecb1df6c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 20:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34e8eb698b1d2552b822affe01606f8 SHA-1: 445af1e9e93a278439dfbf8b76c124d8210cd2f9 SHA-256: e6b66fc1ecb1df6c9e131ef379d29afd38fcef3d85935cdcd49a9dde0e224b4d
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to a known malicious redirector. The document body contains obfuscated text and embedded URLs, one of which points to a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content through multiple channels. No scripts were extracted from this sample.

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/wix?keyword=forma%25C3%25A7%25C3%25A3o+da+placenta+embriologia
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/abbyy_to_word_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/definition_of_management_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/neoplasia_de_prostata.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/gomebe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/wow_classic_mage_leveling_guide_1-_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/2971105836.pdf
    • https://static.usrfiles.com/ugd/a48928_5a0c8e758c544803a3132c5901d7ef5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_61a8fd9d557f4068bb5e783080b20db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdf
    • https://static.usrfiles.com/ugd/b77b08_c8072b428dc34e81a88463c51a9e12fb.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/xezikokigudodasonuxur.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/bosamarogen.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_off00006f0f.bin
2e17157dd65ea1d3efdf1eb3cb04ab3b2b1606a8be0a3ee9a2ebefc3246d5de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0F 5808 bytes
font_01_sfnt_off000081db.bin
c9ae123edf422aac353b865351b7a3e9328508274e8c9d5b694a338cd1be813d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 12676 bytes

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