Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef45205f36ff04f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-29 23:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b24064ffbd90ac848ee3a8abee7aee3 SHA-1: ad9f3715b47858e4cb99a8bc2a4560a9ca4f890c SHA-256: bef45205f36ff04f6ad4b40ba89d4b466bebabca7f56b85f64edcb9642f3e3a6
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and keywords related to biology tests, suggesting a lure to trick users into clicking the link. The primary malicious URL is ttraff.club, which is known to host redirectors to malicious sites.

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.club/wix?keyword=9.s%25C4%25B1n%25C4%25B1f+biyoloji+testleri+klasik
    • https://static.usrfiles.com/ugd/b8c837_719c5dcdcfe849dfae97a78cf33d54d3.pdf
    • https://static.usrfiles.com/ugd/4ae4db_8d81c557c4134b4d90821b7d75523375.pdf
    • https://static.usrfiles.com/ugd/b8c837_25bc10c4aeab49bfb623038ca7ad96a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9a1909134c4d16a35597919a719707.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0710/files/78488102942.pdf
    • https://cdn.shopify.com/s/files/1/0430/7815/6449/files/application_for_uk_citizenship_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82127534182.pdf
    • https://cdn.shopify.com/s/files/1/0446/5029/9555/files/plate_bending_machine_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/wunuviwurikibikesopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/71304897152.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_off0000550b.bin
227c329c7e3b969a41db6224ceb4be97553655bde94b4b360a05570d61410454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550B 5268 bytes
font_01_sfnt_off0000670c.bin
1885735e80625c329dae4b9c32faf41f199bab16375fecb6b3c20bcc3da8a472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 11284 bytes

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