Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b54e7252a161001…

MALICIOUS

PDF

41.5 KB Created: 2020-07-31 22:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03727d5464c18f74ef74f8bed2084b79 SHA-1: 34bc18cbf15496019152b4da28096c6aae8e1898 SHA-256: 4b54e7252a161001a6e0632afe0b77d5ebc5baa59b8c862b5026e18573801ae8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell

The PDF contains a lure that instructs the user to copy or paste clipboard content into a shell context, combined with a request for recovery secrets or private keys. This suggests an attempt to trick the user into revealing sensitive information. The document also contains a high number of embedded links, with one pointing to a known malicious redirector infrastructure at https://ttraff.com/pify?keyword=osx+generate+ssh+key.

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=osx+generate+ssh+key
    • http://files.mfautodetail.com/uploads/1/3/2/7/132740618/mudit.pdf
    • http://files.pmeadistrict10.org/uploads/1/3/0/7/130739517/renoxoxugisumu.pdf
    • http://files.tyrmalinoisaustralia.com/uploads/1/3/1/6/131636972/178813.pdf
    • http://files.nuimagedesigns.com/uploads/1/3/1/3/131398475/finova_jititafos_sifegusazutiv.pdf
    • http://files.alpinedesignsmt.com/uploads/1/3/0/7/130776368/dogipasero-wawusumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/domopiditip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/molikota.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/49539871504.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/78409882294.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/ruwewolivixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/xuxiratawebotowaxekukizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/155864449.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/muraguvoxesetunasorilu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4242/1398/files/9153298340.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/tamexaxofipivefer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.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_off00005ddf.bin
3e6fe0cdb6b41a1cfb5655197db460d31224fcd90bbe26845c9ef1b7d67c190f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 5176 bytes
font_01_sfnt_off00006f7b.bin
f9d8d14c141ec3b1222dca3e65b9436afc7e52df02c7c00ffb283f7ac91c00b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7B 12872 bytes