Malicious PDF — malware analysis report

Static analysis result for SHA-256 575ce37aa8e7c194…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 17:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ad729c30289bb47429fe674704ef64b SHA-1: c11a63c213c748ee6c564ff5f846320a93dc2830 SHA-256: 575ce37aa8e7c194c9ac0bf76c228873f9357c37e204570505240f965ec10306
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/wix?keyword=baki+epis%25C3%25B3dio+27+anime', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDFs hosted on static.usrfiles.com and cdn.shopify.com, suggesting a coordinated effort to mask malicious activity.

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/wix?keyword=baki+epis%25C3%25B3dio+27+anime
    • https://static.usrfiles.com/ugd/b8c837_657c74f870144bc7a1008b0e8912f42c.pdf
    • https://static.usrfiles.com/ugd/7f46b5_0095a46e647b4c089258f647233338d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a133d983df2b4d1285e1179212e4a39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_88df5c8725814e8daedac952781e8b81.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/developing_the_public_relations_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/aberdeenshire_council_school_holidays.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/78836061085.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/vatican_city_history.pdf
    • https://cdn.shopify.com/s/files/1/0431/9336/8725/files/jasujupeforozedad.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a9d8c3bd2f34959b9573af6e6a70b68.pdf
    • https://static.usrfiles.com/ugd/7f46b5_bc1340b218004f8da0ef2fa7fa943eec.pdf
    • https://static.usrfiles.com/ugd/accd1f_40e051a75cbb4ce98eb293d9cf98c953.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/taxegexigunoragunejeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/60520743955.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/xixuvavukipuzas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/routing_number_065000090.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/7950393062.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_off0000651c.bin
b27530e0a238cd52191ec3f3c666d67b84236b48d6fddbf0e8b2bebcc72ec197
pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 5436 bytes
font_01_sfnt_off00007750.bin
0b420dfe7f8a941382ef50c66846cee565d7c1600f187c75f7db266dc07b3763
pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 12344 bytes