Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6121f394ceeee5…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 00:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4572e39a1e77399ceb3ae54627f4963 SHA-1: 0661ee3ab0dc900e81e788dc52d30c0c2e1870c5 SHA-256: 2d6121f394ceeee5deaf8eeddf6bf12023813808823af0aa029f8e56bc7a1858
150 Risk Score

Malware Insights

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

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/pify?keyword=calendario+mundial+2020+pdf+imprimir', likely serves as the initial lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=calendario+mundial+2020+pdf+imprimir
    • http://files.storytellerskgregory.com/uploads/1/3/2/7/132740880/1eb9173b2.pdf
    • http://files.istanbulletinonline.com/uploads/1/3/0/8/130813736/sebedumitatepin.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/toxuseduna.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/zugisugexagawewufo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/disulfiram_davis.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/86964739560.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/baxamix.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/25387738612.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/89628678526.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/short_rest_dnd.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/arbitrase_internasional.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/bapixatog.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/44187015387.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_off000060b5.bin
4368a33263794cd1982f31eae522d94fd28e91cbbf22273122ecbcdfd5613b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 5188 bytes
font_01_sfnt_off0000723e.bin
e57f1a1b3cc60ced9940d9cf9ced18b7b1aba904a0d731834049efb52f186749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723E 10664 bytes

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