Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc0766d821b4651…

MALICIOUS

PDF

38.8 KB Created: 2020-08-25 01:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618e238d85b1504614907ed6e47b6b38 SHA-1: 1bfba4c71a46190969d3fee61ae7afe323c21ef3 SHA-256: cbc0766d821b4651fcf27928b8611e3edb957f0d3ecc9f3d137b56e860c4356d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=multiplying+integers+worksheet+grade+6'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The presence of numerous links, including those to potentially compromised Shopify domains, indicates a link farm or SEO poisoning tactic to increase visibility and traffic to malicious destinations.

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=multiplying+integers+worksheet+grade+6
    • http://raritibuj.tealteaparty.com/uploads/1/3/1/6/131607163/podogevugikux_kobezif_kewutom.pdf
    • http://files.shopthetlily.com/uploads/1/3/1/4/131407704/gosup.pdf
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/aprender_ingles_rpido.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/apk_alight_motion_pro_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/dyson_dc07_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0435/1125/1099/files/82664859530.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/15659561652.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/54201506182.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/61457887498.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_off00005748.bin
6c5f7e24b04aaafb6cae76d5bf5cd5ec65d100b8aa658ca0557f7dadaa0bd7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5748 5640 bytes
font_01_sfnt_off00006a91.bin
05177cf66066a086c97708644b0709a1ce431e88085917dd0e4c07a701f49d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A91 10756 bytes

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