Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57f392d1da83717…

MALICIOUS

PDF

37.5 KB Created: 2020-07-29 23:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540f2722d9f4a340a2e4151df6714dfd SHA-1: 80ea54bb812761175fbc63bda9b7d374c0dd6b9b SHA-256: b57f392d1da837179209febbce58d09e784304930653f517f309e9b742afeb82
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. It also exhibits a PDF link farm behavior, with numerous links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content. The primary attack pattern involves luring users to click on a deceptive link.

Heuristics 3

  • 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.
  • 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=journal+abbreviation+list+pdf
    • http://files.wcchakrahealing.com/uploads/1/3/0/7/130740112/gizusofikoj.pdf
    • http://files.mydebtreliefteam.com/uploads/1/3/0/7/130775025/zixagitememot_xufogimelupux.pdf
    • http://files.skala-world.com/uploads/1/3/2/7/132740637/9458324.pdf
    • http://files.wcchakraheal
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/sonedem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/64866490294.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/68933363197.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/gifiwabopedufomevumolipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/lajemozikudatodatiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/lijixebibitivepajadati.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/danoviko.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/8631632010.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/nodowurodis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/87203790889.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/fijajaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/pubegipefifijaka.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_off000056fb.bin
22e68610106ded191882b84d082332f7f97dd1dab502b4269725b61c5d1849d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 5108 bytes
font_01_sfnt_off00006864.bin
9b11d09cf30e012f13bb91b9c74eac704069effc169559dc6675d3db5d52134e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6864 9596 bytes

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