Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1efd0d7c288535…

MALICIOUS

PDF

71.5 KB Created: 2020-08-20 14:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df182df42a50da65c783426ffa3dcc65 SHA-1: 13d6ca72754daf059eca0a98e8d4b5f9b38d20ec SHA-256: 1e1efd0d7c288535ef45492b180db55949ae654dc1aacc6bf7e8467de1158495
128 Risk Score

Malware Insights

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

The PDF document uses a lure of a 'Certificate of employment example format' to entice users to click on embedded links. One of these links, 'https://ttraff.com/pify?keyword=certificate+of+employment+example+format', is identified as a malicious redirector. The document also contains a link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. No scripts were extracted, and the document body was heavily obfuscated, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=certificate+of+employment+example+format
    • http://wofaf.maclachlanmeadows.com/uploads/1/3/1/6/131606003/c5ae1b056e2.pdf
    • http://files.clinicalsupervisor.org/uploads/1/3/2/7/132740291/d723c1c9fec5e.pdf
    • http://viwaju.abortion-decriminalisation.org/uploads/1/3/0/7/130775062/301f5.pdf
    • http://files.tinabobnickphotography.com/uploads/1/3/0/7/130739366/733a35.pdf
    • http://xutuke.rebeccaattia.com/uploads/1/3/1/4/131407005/molekuvatawuvavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/maruwawixogini.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/amiga_date_cuenta_libro_completo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/febukabefitisesofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/92072291434.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/vokafedozani.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/biostar_g41d3c_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/mikawulaxufarixeki.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/896438569.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c575.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC575 2828 bytes
font_01_sfnt_off0000cf70.bin
9e011780643ab03eb83a47d249275db58bfc64921062d12d15fd8e973a498218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF70 4964 bytes
font_02_sfnt_off0000e040.bin
d3fb18dafe61981a6a789b47c3d262ca7e46c9da5d2bd33a82fe22792c6a46dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 10060 bytes
font_03_sfnt_off000102a4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 4324 bytes

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