Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea8b2d217ad252f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 19:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be7b659021f666dee5b78f50b3371bf SHA-1: 2ae8e5473aea8a408d6a406fc33239f9ea5f4846 SHA-256: 3ea8b2d217ad252f06aec2d0808a0dcddbcee3ad70e46709ffcb2d8cded16a41
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=examen+de+verbos+1o+eso'. The document body, though heavily obfuscated, contains text related to an exam, suggesting a lure to disguise the malicious intent. The presence of many external links, including to Shopify domains, indicates a link farm designed to improve search engine rankings for 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.com/wix?keyword=examen+de+verbos+1o+eso
    • https://static.usrfiles.com/ugd/b8c837_48ef981763f14e7cb887befc3eb6581d.pdf
    • https://static.usrfiles.com/ugd/b8c837_58ad093217334ca2b9ab7adebf70c51e.pdf
    • https://static.usrfiles.com/ugd/b8c837_01b1f4147b24433b9913a6f7bd2d4617.pdf
    • https://static.usrfiles.com/ugd/097bd5_192c566ad68d4d71980518a84ac0b53f.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/lirojujobesazakotibokusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/42894785295.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/arabisches_alphabet_tabelle.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/ludazetupugoduguzagig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/cockburn_sound_management_council_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/fubepizavotubeluke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/82747683207.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/ravepuza.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_off000061fd.bin
563968f748c6747b9223530b769f2381704f6f39bf0cf9a1e3a3d445efdcf343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5216 bytes
font_01_sfnt_off000073b0.bin
507abf50ed1fd4cd75b6bd5f89ae4d0b7033ef31d7def809119abdcc5e8420b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B0 12016 bytes

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