Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81d120bac92fc1f…

MALICIOUS

PDF

45.0 KB Created: 2020-07-28 17:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49299390092fe471ae2c5e6a42df628b SHA-1: 10301ff0d311a7b2842f1b00c3619abb38c3792f SHA-256: f81d120bac92fc1f7a65380a8b6408d7bff2ee907ca81f904993de05dc487c28
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying a malicious redirector. The document body appears to be garbled, but the presence of numerous links, including those pointing to Shopify and other file-hosting services, suggests a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.com/pify?keyword=bogy%25C3%25B3+%25C3%25A9s+bab%25C3%25B3ca+mese+let%25C3%25B6lt%25C3%25A9s+ingyen+pdf, which is likely used to distribute further malicious content.

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=bogy%25C3%25B3+%25C3%25A9s+bab%25C3%25B3ca+mese+let%25C3%25B6lt%25C3%25A9s+ingyen+pdf
    • http://files.lynnkirkham.net/uploads/1/3/2/6/132695651/bcaa862.pdf
    • http://files.oldrivermasoniclodge.org/uploads/1/3/0/8/130873794/kaxozu_tobidabezi_xefuxube.pdf
    • http://files.dkgindiana.org/uploads/1/3/0/7/130775509/e31d61.pdf
    • http://files.saoirselee.com/uploads/1/3/0/7/130776363/xujifozawov_zosowego_folixam_talimuxudud.pdf
    • http://files.oldrivermasoniclodge.org/uploads/1/3/0/8/130873794/kaxozu_tobi
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/10982863924.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/49267493173.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/95717509988.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/wogikikebatemazug.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/36528483538.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/vezuronasowijidorodape.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/27432191809.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/86417817033.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/kovusix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/78052475379.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/42171670752.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/biwiwubewamidexofivoture.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/64342786826.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/31958226543.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_off00006dc1.bin
d2d2ca888bc41419ab7314d75680dbbb6ac2f7915b4028ab593f8abe5fb24733
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 5876 bytes
font_01_sfnt_off000080d9.bin
a2434423c4be89e312d4c367eaa20f3c62acfe811ae1aff947b7817c714f7148
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9 11304 bytes