Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5548214d59c262f…

MALICIOUS

PDF

46.0 KB Created: 2020-08-10 13:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75c691b6c14836c9cbd494388b7f096b SHA-1: 3ba307d92778a7b249387815c220b053e80b37e5 SHA-256: b5548214d59c262fec35d2dfdf4dfa896f5b9cbacfc223ce7f707171415167f7
160 Risk Score

Malware Insights

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

The PDF contains a lure to install a browser extension or update, which is a common social engineering tactic. It also features a mass external PDF link farm, with the primary redirector URL pointing to a known malicious domain. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, likely to disguise the malicious intent. The primary malicious URL is https://ttraff.com/pify?keyword=cardiomiopat%25C3%25ADa+de+takotsubo+pdf.

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.com/pify?keyword=cardiomiopat%25C3%25ADa+de+takotsubo+pdf
    • http://files.dirtmastersinc.com/uploads/1/3/2/7/132712676/fuxed-zixedagenifu-lokakodawab-rokom.pdf
    • http://files.fmcameraclub.org/uploads/1/3/1/6/131606673/19a57c82742.pdf
    • http://files.primaverapreschoolatl.com/uploads/1/3/1/6/131606393/babotesabusuwik_mipubifel_banidimuja.pdf
    • http://dopenuw.takebackyourtv.com/uploads/1/3/1/4/131407469/dodenokorexifal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/wadipuzitebegol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/basic_c_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0552/files/donotozalulisugizupit.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/gta_vc_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/24520774630.pdf
    • https://cdn.shopify.com/s/files/1/0437/7339/5101/files/obc_caste_certificate_form_delhi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/soda_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/ncert_class_11_biology_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/veson.pdf
    • https://cdn.shopify.com/s/files/1/0440/5270/9526/files/videojet_excel_170i_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/tawujuteruvadibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/tazebipazifim.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_off000071cb.bin
c0972d6a3feaa1663d343c3fbf504c3ed1553e441343078ae50831b9f7dfd329
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 5316 bytes
font_01_sfnt_off000083c7.bin
445bcf35bf43513ea8c92157bf48c793edfd99b66ddf6bbf15a86544d59c118d
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C7 11500 bytes