Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bf1450e5ee7aad…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 03:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44db1043a76ecfdba21d8aacd1f25df8 SHA-1: fe764628730edcb38fa0e9ccd37ccffb1fa6bd8f SHA-256: 97bf1450e5ee7aad410639679d246cae945c31ffc9ab5b96acc6f5a4ad0ae6e4
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Electrocardiography pdf download'. The presence of a link farm further indicates an attempt to manipulate search engine results to distribute malicious content. No scripts were extracted from this sample.

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=electrocardiography+pdf+download
    • http://files.tylersmith82.com/uploads/1/3/1/1/131164431/nevanijivelilowi.pdf
    • http://files.chezhospice.org/uploads/1/3/0/8/130874585/rovewasobex-dudenexifo-garakanujuwoj-vonovafonunu.pdf
    • http://files.whitemudtrading.ca/uploads/1/3/1/4/131454492/lovimikiva-pokiti-xufakikuwilani-gaziwuzidofex.pdf
    • http://files.priscillabe.com/uploads/1/3/0/8/130874143/3467f3ff.pdf
    • http://files.chezhospice.org/uploads/1/3/0/8/130874585/rovewasobex-dudenexifo-garakanu
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/11243437543.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/86331679375.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1191/files/wonexofuluvupojovakovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/matixasesiwenul.pdf
    • https://cdn.shopify.com/s/files/1/0437/5343/9383/files/6990722956.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/lokinuvegadugipinixasataw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0917/1879/files/lejulasutilugusu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3225/4376/files/giwopidizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/biwopepajojobepasidaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/gemulokowunarinunodop.pdf
    • https://cdn.shopify.com/s/files/1/0436/6529/3462/files/bebekobekifukitevuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/tamep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/bedaginuvesitifolamitupum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/52021344758.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_off00006fb4.bin
e29e46cd7b7223e7a71ad8f8a220594c567640fbe2f89dd6079d0a417afff0da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB4 5176 bytes
font_01_sfnt_off00008159.bin
4f441ca7549e37dce86c9c9b2e2299167c963dfc0ec2eb9e0d6d133f2f11eb57
pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 10112 bytes