Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb609612c5ba033a…

MALICIOUS

PDF

38.5 KB Created: 2020-08-06 08:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73e7348e70b0b4f8bbb29e3f8f96eb91 SHA-1: ecacbae97d7fc8c636e06e944e73709e3592f434 SHA-256: eb609612c5ba033aeb5f25ef0034bb1c2761c7bfd033079243612cc0abe1058f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of malicious content.

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=medical+biochemistry+questions+and+answers+pdf
    • http://files.drjohndegarmofostercare.com/uploads/1/3/0/8/130813715/suxorema-duzinen.pdf
    • http://ziwaguze.acozydeal.com/uploads/1/3/0/7/130775734/laluwosifosebila.pdf
    • http://files.abbottspatchcollection.com/uploads/1/3/2/3/132303312/187834.pdf
    • http://files.keanoraubun.com/uploads/1/3/0/9/130970005/c9c76e6c397.pdf
    • http://files.salmonfallsgardencenter.net/uploads/1/3/2/7/132740294/2626ed6697.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/arranged_by_nelson_riddle.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/python_ldap_authentication.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/rusozuxibekiganowitosipof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/3517176456.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/narukaxetolup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/revasibemuxotosel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/82254662319.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/21015263953.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6535/files/nodoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/95023875426.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/innovativeness_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/rixisezawaverapajuwa.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_off000056fe.bin
23bddd576774acb7a3605bc74a5680bc2e9f13c175a1fd0c12991eacf25acd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FE 5860 bytes
font_01_sfnt_off00006ada.bin
facedf3970564f009a277008d9fb66b4eeeb7e2ae8f9ed5ae3bb8c9dc4ab369c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADA 10076 bytes

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