Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6cfcc7f258d887…

MALICIOUS

PDF

44.8 KB Created: 2020-08-07 23:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c7ddfc9e8073c0fe75d2eb3547bdfe SHA-1: 13405f066f56298b6d6be6b52db9eb06574ffa05 SHA-256: fe6cfcc7f258d887e842ac2432ecfd47d0132dc5dbac73e0dd2e9dc1673c9d52
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. The primary malicious link identified is https://ttraff.ru/pify?keyword=types+of+shallow+foundation+in+civil+engineering+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to academic topics and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent of the embedded links.

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.ru/pify?keyword=types+of+shallow+foundation+in+civil+engineering+pdf
    • http://buniz.missiedphotography.com/uploads/1/3/1/4/131408100/nuronepatonexixivub.pdf
    • http://files.reasawmills.com/uploads/1/3/1/8/131857631/suwukumij.pdf
    • http://files.simoncdrew.com/uploads/1/3/1/4/131407135/binedonedojoduvapiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/tfs_power_tools_2015.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/mananuliseze.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/4694323588.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/monasejifunerojerivem.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/kexazugexeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4212/7527/files/17997171314.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/sql_server_2020_alwayson_availability_groups_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/93392246610.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/ridugok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/nilaxefawupepejepes.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_off0000708c.bin
39ddccdd7422d547518293dde5531f9b3dec45a06a84275f27ad36ad6890a36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 5620 bytes
font_01_sfnt_off000083cf.bin
22d334d5dc6d490934b8c7f1f3712b7f56605702a9f33b1050fb9072a91e87f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CF 10188 bytes

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