Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12071b4d2fa6437…

MALICIOUS

PDF

51.7 KB Created: 2020-08-25 08:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102bddfbd1237137739e170fd5f0189d SHA-1: f364d78c9a28f5c9612d56da80d477a25416910b SHA-256: b12071b4d2fa64372ae0b505788bbea05f5cf11a284a83e1053bcf72befadd61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a lure to install a browser extension or update, indicating a social engineering attack. The primary malicious link, https://ttraff.ru/pify?keyword=best+android+emulator+for+pc+for+pubg, is a redirector. The document body, though heavily obfuscated, contains this URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=best+android+emulator+for+pc+for+pubg
    • http://files.angelacarlsen.com/uploads/1/3/2/6/132696210/mabidumipumosid_jidisitupe_lusajeroz_tubafotobod.pdf
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.pdf
    • http://files.angelacarlsen.com/uploads/1/3/2/6/132696210/mabidumipumosid_jidisitupe_lusajeroz_tub
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/wondershare_editor_pro_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/wupogofemamevimeve.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/29400410046.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/filmora_video_editor_for_android_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/annapurna_devi_ashtothram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/putoputugogivapajoge.pdf
    • https://cdn.shopify.com/s/files/1/0429/5111/4908/files/primera_cx1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/quadratic_equations_explained.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/14558219603.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/karambit_fighting_techniques.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_off00008b5d.bin
2537b941609360175a37546c5dcc09b9915d216a5681529157c3c9f7fd7a727f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5D 5664 bytes
font_01_sfnt_off00009e7d.bin
a35b0b9283dee041ded9fbb475f141d6e016125d14519d1c6be570d8bb2927d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7D 10364 bytes