Malicious PDF — malware analysis report

Static analysis result for SHA-256 437bc0deec297f68…

MALICIOUS

PDF

32.4 KB Created: 2020-08-10 10:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47b61e22eb8ba2affc7693e69ed07675 SHA-1: c561d0cf67608d5537999c0a01ed1b0ff2537609 SHA-256: 437bc0deec297f68f8e0a3c70ef0885cb6b1aca9ed4ca01405d27ec21083bb8e
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a malicious redirector link, indicating a social engineering lure to trick users into clicking through. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document's content is designed to prompt the user to install something, likely leading to malware or credential theft. The primary malicious IOC is the redirector URL: https://ttraff.ru/pify?keyword=alter+ego+b1+plus+pdf+gratis.

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=alter+ego+b1+plus+pdf+gratis
    • http://jafewuzeg.ingridblacypto.com/uploads/1/3/1/6/131637316/08c6ce7cff.pdf
    • http://files.markchristophergarrett.com/uploads/1/3/1/6/131637291/762a93.pdf
    • http://files.ansuschoolofsound.com/uploads/1/3/1/4/131453194/b0906070fb.pdf
    • http://files.leicesterhotshots.co.uk/uploads/1/3/1/3/131384573/nojududu_woxipeli_nalavifat_bogakaj.pdf
    • http://kabimili.transitionintowellness.com/uploads/1/3/1/4/131482975/6d77783de.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/3360044535.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/niribevewu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/difaxilezidaxulunik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/situkopaxikel.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/20593749249.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/jonex.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/avesta_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/4917/7508/files/99482730703.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/41257072308.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8787/files/zujit.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/new_apostolic_church_doctrine.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_off0000439b.bin
34b5fb6cae6ca379841f8760ca67d452d6f0a0fada67788f3a566c4ef8b54bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x439B 5392 bytes
font_01_sfnt_off000055fc.bin
d51c36afb13ae9faaa965911ab77b33edb4afa6a9ded7117c108d3a093d79601
pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 8940 bytes