Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f20d7d9c7a8fc87…

MALICIOUS

PDF

51.1 KB Created: 2020-07-28 21:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 913a46ded7d15ca7d687969ea9a6115a SHA-1: 62f4b926e7931e137ea045a40734730bca0aff8e SHA-256: 4f20d7d9c7a8fc87d4015ef5e68d6697b7666cc02a893a8565b9509033dc6819
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised with a movie song keyword. It also exhibits characteristics of a link farm, with numerous embedded links pointing to Shopify domains, likely to obscure the malicious destination. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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/pify?keyword=agathiyar+movie+video+songs
    • http://files.trailheadmcs.com/uploads/1/3/1/3/131379181/956953.pdf
    • http://files.positivesportcoaching.org/uploads/1/3/0/7/130739204/nafifex.pdf
    • http://files.pondviewmanor.net/uploads/1/3/1/4/131452735/618e02833169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0434/6501/5460/files/sixonubulujumebupegapakeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/zusudulefuzajejipageg.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/12828470311.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/48357598993.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/49596621595.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/dirosilig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7269/files/53664419671.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/daxovonas.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/
    • https://cdn.shopify.com/s/files/1/0427

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000728e.bin
4a3b19456581798e63837c05cff9f0ddf9be61d947757962007d926cdd56de46		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x728E 19176 bytes
font_00_sfnt_off0000612c.bin
8b5427b26a0cbed0cfe53574b69cf908cc88ebf81c4c6159c7831cacd7cdeb9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5144 bytes
font_02_sfnt_off00009ca0.bin
710cff074394a4d356d311868ea7a5bf474fc49c9ab69c8f9b0881f92de7757f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA0 10060 bytes

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