Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d93fe55d50db800…

MALICIOUS

PDF

43.0 KB Created: 2020-08-21 06:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662da86d46604f84f616114c4f339dc4 SHA-1: 1d33a784af3b2d2101a18ce67f0122a6e471981e SHA-256: 8d93fe55d50db80078e4266f1980660c8562bb4e196897f49e00b8cca3c02d59
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cite+your+references+apa+format'. The document body, though heavily obfuscated, contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The presence of multiple embedded URLs and the heuristic firings strongly indicate a malicious redirector pattern.

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=cite+your+references+apa+format
    • http://gowefib.thorsonpto.org/uploads/1/3/2/6/132696067/9dc36ecc91.pdf
    • http://files.catholicchurchofantioch.eu/uploads/1/3/1/6/131606069/gumurimok_sujadudowaxeso_rixorira.pdf
    • http://files.indianrocks.com/uploads/1/3/0/7/130740521/tilavo.pdf
    • http://files.lifeloveparenting.com/uploads/1/3/1/4/131453713/relonexudolalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/66608710772.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/mivogigowal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/comfortable_lyrics_k_camp.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/11351553055.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6970/files/27415101493.pdf
    • https://cdn.shopify.com/s/files/1/0447/7875/0101/files/greenland_ice_sheet_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/post_office_charles_bukowski_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6597/files/84012507261.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/velijexax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d81.bin
db86a2d9ae74e5eda4b74c1f28aa6b67cb665a6e02925d6720ad9d933bdd89bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 5136 bytes
font_01_sfnt_off00006eeb.bin
4bd310aa0cde5e59a21b93566cb638f1d8d493258a3320978a6fa27c4f800116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 10060 bytes
font_02_sfnt_off0000915a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915A 4324 bytes

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