Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb28e6cf0d1835d6…

MALICIOUS

PDF

34.5 KB Created: 2020-09-02 20:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87d407ad6479d78e51c21a79f71a2b87 SHA-1: e7e2830ae3422a97e0abf9c65eb7e7b67f27606f SHA-256: cb28e6cf0d1835d6f8db556a519190d144edb3c03fcb257b5299b77a1a0685ef
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 pointing to numerous external PDF files. One of these links, specifically `https://ttraff.link/pify?keyword=mxq+pro+4k+android+tv+box+rk3229`, is a known malicious redirector. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its intended lure, but the presence of the malicious redirector is a strong indicator of malicious intent, likely to lead the user to a phishing or malware download site.

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.link/pify?keyword=mxq+pro+4k+android+tv+box+rk3229
    • https://static.usrfiles.com/ugd/7f16bd_1e1cb110889a4d919989c7896ba09ef2.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_8214861d804643e297090e0e30e316d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2385d517cd24c5f8a47f9ca32f2eb64.pdf
    • https://static.usrfiles.com/ugd/fbccce_4e9f08d5eef849df93905c9a5d4a9e32.pdf
    • https://static.usrfiles.com/ugd/0d2fda_c08640223678434eac751f585b77d546.pdf
    • https://static.usrfiles.com/ugd/a18aa6_d7022bef68084ac58ec9733c8a817cc3.pdf
    • https://static.usrfiles.com/ugd/aef5b7_949a16e450454f14bf2941f31ee99e96.pdf
    • https://static.usrfiles.com/ugd/b8c837_46e0c58e1bab46e691f51630ab7c73a6.pdf
    • https://static.usrfiles.com/ugd/26481d_007f259efe2f4fb49ff6c9268e10b945.pdf
    • https://cdn.shopify.com/s/files/1/0464/7383/8744/files/58985000258.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/fixitinafezip.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c41bea29aba489cbd092bdc608078f5.pdf
    • https://static.usrfiles.com/ugd/6846fe_bc9a229998c84b46b8aeb94fca2a9bc8.pdf
    • https://static.usrfiles.com/ugd/ecd213_877ed8f3128d4244b798692676908f17.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_off00004717.bin
1f4ffc10c511a8af512e2916b3d30a5948f13df0d86224e7f1e958b9e9becb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4717 5744 bytes
font_01_sfnt_off00005ad2.bin
cb403d53dbb6773fd484c105b564f3808b383d741ce53926b95480601150d50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD2 10140 bytes

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