Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b418d4a79da3b8…

MALICIOUS

PDF

55.6 KB Created: 2020-08-31 11:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923a0f70ccd1d54d8a2a107e794ac390 SHA-1: 294d438b707f288cabbb3a0586c206ba5ee530e1 SHA-256: c8b418d4a79da3b88dedc010d16dca52403d1082574e9fb55768d611be51bd59
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of the primary links, 'https://ttraff.ru/wix?keyword=Daelim+scooter+delar+lista', points to known malicious redirector infrastructure. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL and the link farm heuristic strongly suggest an attempt to lure users to a harmful destination.

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=Daelim+scooter+delar+lista
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/delazibem.pdf
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/64741933779.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/ano_ang_pabula.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfe136bcdc9e448dbf4c3a112f7ebd87.pdf
    • https://static.usrfiles.com/ugd/ca300b_3406868fc0df4ac2bd4fece78ddc6a5a.pdf
    • https://static.usrfiles.com/ugd/217d68_aed7c2697c924d3480dbbb2990f6aae7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/nezupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/40168337822.pdf
    • https://static.usrfiles.com/ugd/b8c837_178c536f9ba64233bfc1ff9fd0ce9316.pdf
    • https://static.usrfiles.com/ugd/cc14e4_2e04dc0808fb467eb4857c8aeddb4188.pdf
    • https://static.usrfiles.com/ugd/b8c837_64705baa84e54f04aaef17b344e24764.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_off000090a5.bin
ebae45f30b6f9dc279ab4bca7d78c37ae223984cc6fd212f52adcc58fbcc0e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A5 5084 bytes
font_01_sfnt_off0000a1d0.bin
58da4c74dd6b1a7e23119563eb2707af398b7834c71fa8ea9beb6169eaa2f085		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D0 15292 bytes

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