Malicious PDF — malware analysis report

Static analysis result for SHA-256 545d8b4b2ad73822…

MALICIOUS

PDF

48.6 KB Created: 2020-08-09 12:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bf0ec21f808971dad84d2dfb9035c3 SHA-1: e9f029eb3d627608e20bb3e3f934c264ca8ca715 SHA-256: 545d8b4b2ad738220e832f2c5a984f6645372e899b443eb63adf12a672944eb4
168 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action button and a link to a redirector, indicating a social engineering lure to trick users into downloading malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirector leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of links are present, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the document body contains the malicious redirect URL.

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.
  • 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
  • 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.cc/pify?keyword=pdf+booklet+creator+free+download
    • http://files.willowslifestyle.net/uploads/1/3/2/7/132740584/figosojoxo-pitujogutak-nikitozi-paveso.pdf
    • http://mizirib.grinnellcecbucketcourses.org/uploads/1/3/1/1/131163590/1500684.pdf
    • http://files.victorianfashionsociety.com/uploads/1/3/1/1/131164456/kovewuzububixuvaf.pdf
    • http://files.lfsespagnol.com/uploads/1/3/1/3/131398076/7074a416.pdf
    • http://files.megan-livingston.com/uploads/1/3/1/4/131437474/65d4ab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/153731434.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/96350311969.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/nasarobugopoputubowofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/59064397950.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/lipivezututop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/xokamupezemeditev.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/25432554352.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3889/files/57874758696.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/daft_punk_discography_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/wusinewowubiliboz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/87495752918.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/
    • https://cdn.shopify.com/s/files/1/0430/6498/370

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008101.bin
17c366f5768f7cf2956273e8eeabd3f1d67dcb65435386f470c8ca04b5559340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 5132 bytes
font_01_sfnt_off0000929d.bin
a1ecbc76832745eca9bf636741fec7d51bc97fcfce3b81c91ff4d989c2416b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929D 10172 bytes

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