Malicious PDF — malware analysis report

Static analysis result for SHA-256 893eebb831451d6e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 21:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b6a0ad1695db856caab32a4529ddb8d SHA-1: 5565e0148817f3fa1a49a7d4b90674d7ea7c5271 SHA-256: 893eebb831451d6e6fe4246ba1c3c5a76a71bc0fc1ff228bb7cdbe5ed7c8949c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=descargar+age+of+mythology+gratis+pa'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading something. The file also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. The document body itself contains garbled text but includes the suspicious URL and a reference to 'wkhtmltopdf', indicating it was likely generated programmatically to host these links.

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=descargar+age+of+mythology+gratis+pa
    • https://static.usrfiles.com/ugd/8ab72e_c165fc56fc204fb8bb97b6f48926490e.pdf
    • https://static.usrfiles.com/ugd/299074_5e30ab017b37412ea5f0d56eb9543b09.pdf
    • https://static.usrfiles.com/ugd/097bd5_eece80d23cb74f20bbb623d2332a9a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c40bed4106164791b4c1f9a8b5d2d4de.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/widimalufezepen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/bocce_ball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/battlefield_2_map_pack_single_player.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e32b66f6294d6b98eaf0221bf5f332.pdf
    • https://static.usrfiles.com/ugd/b8c837_22813a1d775f470e99dea0f87da2c60b.pdf
    • https://static.usrfiles.com/ugd/4f270c_ae73055482f942689d4588afc2bf35bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d850670ac11a4000abbfad43d7352e1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/gozabosoniz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/repuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/6403/9326/files/26013290854.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/clinical_pharmacy_and_therapeutics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/betenowarebazubaraweg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c8.bin
7a39036cc2f74dd30d61e38ddb896103dcdb64edd42876264c66a43d655e4760
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 5212 bytes
font_01_sfnt_off0000798e.bin
f1a6f91b6893dad17d7c7f8f269698fb285d8070489f8d0af64f18f45eaf4429
pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 10552 bytes
font_02_sfnt_off00009d54.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 4324 bytes