Malicious PDF — malware analysis report

Static analysis result for SHA-256 90837f57fe62455b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-08 23:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 554cd5a4f79b342ce4914c523e8f2bac SHA-1: 9253aca609a255823581df0f4956b3d070a772db SHA-256: 90837f57fe62455b2690a3ca6df0c8f0621cf11c77020e54ba501699c15f1ce9
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 external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and other Shopify-hosted PDF links, suggesting a link farm or redirection strategy.

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=que+es+un+texto+publicitario+pdf
    • http://mefogukub.njguardiancanecorso.com/uploads/1/3/0/8/130814238/tiwafifu.pdf
    • http://files.glycanskincaresystem.com/uploads/1/3/0/8/130874097/6680498.pdf
    • http://files.mattduffybaseball.com/uploads/1/3/1/4/131407357/buwapida.pdf
    • http://files.anseasternwashington.org/uploads/1/3/1/1/131163559/fokum-xipoxadikanite-balukologu-zerimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/wewekelerodegazix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/virarerurilobixafebeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/wofanizibozuxut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/watovulatajifowamug.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/2003_audi_a4_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/67289150518.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/definitions_of_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/35871656557.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_off00005ec2.bin
468009471f9b738bf8f9dade6c50682cf9734971582676e5bcfdf45bd9946309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC2 5420 bytes
font_01_sfnt_off00007139.bin
86106c05d6cb33c80dee751196cd7fe824e0bd5ac3178a3b48016c5e2c02a299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7139 10556 bytes

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