Malicious PDF — malware analysis report

Static analysis result for SHA-256 31515f048e874094…

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 11:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60141324c5560556368f53a4fc7b5d0d SHA-1: 72d1da7db1985f4ff599419c0a916fdbd691d822 SHA-256: 31515f048e8740940f0407e8e9969e407a201f559e3227ff08765af182fb4680
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 malicious redirector link disguised as a browser add-on download. It also functions as a link farm, pointing to numerous other PDF files. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's social engineering tactic. The primary malicious URL is https://ttraff.com/pify?keyword=web+to+pdf+firefox+add+on, which is likely used to redirect the user to a site that will attempt to steal credentials or deliver further malware.

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=web+to+pdf+firefox+add+on
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://files.abatelakechapter.com/uploads/1/3/2/3/132302780/3ad94d.pdf
    • http://files.stuckathomeipedia.com/uploads/1/3/2/3/132303320/2015584.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/45438263671.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/77609302909.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/dark_souls_sound_effects.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/57282297096.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/75812412080.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/47635317701.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/nemenipixepijip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/maxumune.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/75593261556.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/waburutugidejipimanug.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/taxoteroniti.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_off0000675a.bin
dce6e31b6520c84577499e377a698e751974cc478c94d45ccd074199c867ac3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 5044 bytes
font_01_sfnt_off000078a1.bin
fcb886be32c422fb103f4533c64410868ec1c221b6e6ebfd195092c41fe35bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 10504 bytes