Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b79e58fc22cb52d…

MALICIOUS

PDF

41.0 KB Created: 2020-08-31 15:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4bfa9803c510ee9741c860a374f862 SHA-1: 2ecf40b7cb1a93b4eef7ce6a07561d183b22971e SHA-256: 4b79e58fc22cb52d2a900f30c05f38b960201f15783d0e945068e34b124790c9
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though partially corrupted, contains Catalan text and references to formal accommodations, suggesting a lure. The presence of a large number of embedded links, many pointing to Shopify-hosted PDFs, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination.

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=acomiadaments+formals+en+catal%25C3%25A0
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/video_show_program.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/autoclicker_cookie_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/10988471958.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/pesozowelolotewefejali.pdf
    • https://cdn.shopify.com/s/files/1/0437/4629/5959/files/21222613275.pdf
    • https://static.usrfiles.com/ugd/b8c837_00705759c42b404bb7035d577849eafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/28363767405.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/20699252434.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2375/files/membrane_filter_technique.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://static.usrfiles.com/ugd/a107db_d73e84cceaff490cb09a29dff8267b76.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.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_off00005b88.bin
9f4d1e0af0973078369d1dcf3ff569e086902b0320f3f63e8b672c525b48d6de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B88 5388 bytes
font_01_sfnt_off00006d38.bin
e4b65bc6ea8a2657c9c3f2000735496780932b1f342f6dc272f815f6507aa5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 13512 bytes

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