Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a8b871d6b9e8d4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 06:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e57e5176e22b8d2da86a2e19f7efa3 SHA-1: 3ef14b3d2622a90963bc390b70f05f2e604107c1 SHA-256: d3a8b871d6b9e8d41723b85e869c3aee9eeadc169638637a60c29eedee360511
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=free+vector+graphics++cdr+file', suggesting a lure to download a file. No scripts were extracted from this sample.

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.com/pify?keyword=free+vector+graphics++cdr+file
    • http://files.customer1stelectrics.com/uploads/1/3/1/6/131606360/446283.pdf
    • http://files.nolafoot.com/uploads/1/3/0/9/130970022/ganafizekevixul-xifediwinik.pdf
    • http://files.simplypairedcatering.com/uploads/1/3/1/4/131483201/werakiwupopobu_polibixedawe_ripuvubidij.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/jujunuzajobasisazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0914/7043/files/importance_of_cation_exchange_capacity_in_soil_fertility.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/facebook_code_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/0617/3077/files/container_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/55113667838.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/vikunifovapopibijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/40469000800.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/guia_ceneval_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/43153113755.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/annabel_lee_poema_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/92787176176.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000511f.bin
1c25ba7cf32fff2477f0e9d424c4ed1ee70790665d1a51a279414be990a25a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x511F 5116 bytes
font_01_sfnt_off000062a1.bin
85f0ce13253258a23908b35d0d7949021ebb31ae8662f058a092dd9df0b57420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 9840 bytes
font_02_sfnt_off0000843d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 4324 bytes

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