Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdd22d65737f118…

MALICIOUS

PDF

39.9 KB Created: 2020-08-20 23:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8429ed30bb860b3f1dcacf48995fe8d1 SHA-1: df980a64437d1a1c77bcefbc273469f33eace014 SHA-256: 9cdd22d65737f11878419dfa55f90eb0a5eda16d5f4e39c492a345c83b20b9c2
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=aa+bridging+the+gap+forms'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on shopify.com and wildflowerdesigning.com, suggesting a broad distribution effort. The primary attack pattern is likely to lure users to malicious sites via these embedded links.

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=aa+bridging+the+gap+forms
    • http://files.wildflowerdesigning.com/uploads/1/3/2/6/132681513/lejorutavere.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/fimapijadun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/fataru.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/95548198209.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/pdf_encyclopdie_des_animaux.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/30106106277.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/nabobuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7707/files/tratamento_para_doena_de_chagas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/61561321429.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/wudunov.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_off00005a63.bin
bc8c026547357e77127b4815bc81b3886c5ae6b8bb3401a44714337707065df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A63 5552 bytes
font_01_sfnt_off00006d0c.bin
c00c7c739201b0905d559bd3490bdc46daa7d72335f367d7be5427d8e95f2d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0C 11308 bytes

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