Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca07e81af9d659ed…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 07:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98277f03b41173486845da6d77696f35 SHA-1: 0311e949ff5ae531278bbb8b07b64fd61df03e8a SHA-256: ca07e81af9d659eda005cb47471fbc0b2cb3392f818ab28d67552e7c9a3bccbd
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=holland+lop+bunny+care+sheet, which is identified as a malicious redirector. The presence of numerous external links, many pointing to Shopify domains, suggests a tactic to distribute or mask malicious content. 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.ru/pify?keyword=holland+lop+bunny+care+sheet
    • http://files.hybrex.org/uploads/1/3/0/7/130776393/tuvadokasi.pdf
    • http://xobeto.abhyaas.org/uploads/1/3/1/6/131606227/6639551.pdf
    • http://gifapigu.dare-h2020.org/uploads/1/3/1/6/131606289/fisavaxaxupez-xaruj-bipemuwogi-subefimawajujo.pdf
    • http://repuv.howlingwolfstudios.com/uploads/1/3/2/6/132681352/dalifefupe.pdf
    • http://files.chaunceyrasmussen.com/uploads/1/3/0/8/130814596/buwad_pivukaza_rinobogefanel_wakarazijexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/21516493998.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/10582211284.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/23271270423.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/velemubalogobepubovefuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/22672029944.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3529/files/sovaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/63902754395.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/74837128762.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_off0000672a.bin
3abb886bad8c36a9c79d5e4065c6d002219ba0b3350669744af811e86881fec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 5364 bytes
font_01_sfnt_off00007957.bin
40a37c9e85e203e0a07f204da3cf4da3bbe96c6402fd805482691d48bf3113b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7957 10320 bytes

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