Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e45483249f1f01…

MALICIOUS

PDF

34.8 KB Created: 2020-09-05 05:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6903457841b72dc2bb7bac15731ba6f1 SHA-1: 137e172f1c46c2bf7e20797a995fa45498476db3 SHA-256: b5e45483249f1f01b0be65f62014da4721742fb94213cccaa02736754c03e4a8
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a judicial branch scavenger hunt answer key. The document also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which point to static.usrfiles.com. The primary malicious intent appears to be directing users to the malicious URL for further exploitation.

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=judicial+branch+scavenger+hunt+answer+key
    • https://static.usrfiles.com/ugd/097bd5_01340d9b19b940d29c4bc97c2a76901d.pdf
    • https://static.usrfiles.com/ugd/2f07a1_f7e4dc6681b742cfb228b681f3041467.pdf
    • https://static.usrfiles.com/ugd/a91264_034cb2ba3caa40a4add5e2175993447d.pdf
    • https://static.usrfiles.com/ugd/628a76_e9bb8ccec845435dbd1a5ca5e7a1fc1b.pdf
    • https://static.usrfiles.com/ugd/c068f8_6ef050146b264531873f90b94aa9665f.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_d5c3f93446054937842b77449dfa2c2b.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/genetic_engineering_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/mirete.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/budafiruginibedobivoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/28074477319.pdf
    • https://static.usrfiles.com/ugd/e9cba9_3c4d9e53498e4e2995da0e2cf07029d6.pdf
    • https://static.usrfiles.com/ugd/5f4192_234e35eda9494d7ea3eb1b21b2f904f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_af46178635b24690bcc99f6758291b71.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_off0000497d.bin
67669fa1a9a4305ab43ca9cfd2395bb4012e8d65a92e162cc70df3e3d7288a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x497D 5648 bytes
font_01_sfnt_off00005cbe.bin
a76057959a304a740df8826600f84be171164906f97a4da907cf834234778a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 9924 bytes

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