Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7db8c9618bc372…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 07:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50476ca2efea6f0af2020ae61cfb491a SHA-1: 6f1dc5385e9e3f79f6b48b24cf9402c5219b892c SHA-256: cd7db8c9618bc372f0bd03df82a1f9c4cd4905960d6a672489cebf4692a23cef
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to obscure malicious destinations or to create link farms for SEO poisoning. One of the embedded URLs, 'https://ttraff.com/wix?keyword=pilot+sony+rm-adu005', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains what appears to be junk data, but the presence of the malicious URL is a strong indicator of malicious intent. The file also contains numerous links to Shopify-hosted PDFs, which are likely part of a link farm.

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=pilot+sony+rm-adu005
    • https://cdn.shopify.com/s/files/1/0462/5042/6519/files/app_store_for_pc_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/48333860620.pdf
    • https://cdn.shopify.com/s/files/1/0439/7596/6878/files/pixexigijajadabetibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/medajofosafa.pdf
    • https://cdn.shopify.com/s/files/1/0438/9348/9832/files/51960772058.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2a7b9e453ab42369fa6184c26b403f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c56d22cc3af4970ab81114e089065db.pdf
    • https://static.usrfiles.com/ugd/e2f197_ee1cb4907c6545d297ee1194fd100622.pdf
    • https://static.usrfiles.com/ugd/fd7405_9cde3d9c79a243afb8929dfdfe84ee83.pdf
    • https://cdn.shopify.com/s/files/1/0459/9100/2279/files/51402531922.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/75170098599.pdf
    • https://cdn.shopify.com/s/files/1/0436/3278/7609/files/31291785829.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/mixiwazu.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_off00005e16.bin
dfa7b8917e3bb923b0af533c22b42c10e4043baa9fb3c1937fd34b106706d10f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 5136 bytes
font_01_sfnt_off00006f60.bin
1934cb7002ec4899ed411c11a73b504eaa35ff7b1bf098007b44ad86a8ad0f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 14044 bytes
font_02_sfnt_off00009b79.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B79 4324 bytes

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