Malicious PDF — malware analysis report

Static analysis result for SHA-256 959636454b63dccf…

MALICIOUS

PDF

44.1 KB Created: 2020-07-28 08:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe85e5a18fddd63a4b84a21b7d9fd571 SHA-1: 68f2438efd2cc7ba55de6d87eecc569fc1941788 SHA-256: 959636454b63dccf84eb4b2dd40a0ce9bb7e9d1d2b827ff7bf06554ad29be771
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM suggests a link farm strategy, with numerous embedded links pointing to external PDFs. The document body, though heavily obfuscated, contains text related to 'free sheet music', likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

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.cc/pify?keyword=free+sheet+music+for+easy+guitar+songs
    • http://files.workinnvision.com/uploads/1/3/1/3/131384018/zudemesenodevakani.pdf
    • http://files.lfhsfoundation.org/uploads/1/3/1/8/131856476/darozasuzix.pdf
    • http://files.mansfieldhouseofprayer.org/uploads/1/3/1/6/131637043/f24076c3.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/gejewerodutomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/jajozopimijujigawukumejez.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/32375948936.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/gutipidenivazol.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/61814143326.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gikari.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/19026253700.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/179728319.pdf
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/23465896457.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/difudon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/7091356724.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/23388705038.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/1/0434/0521/3852/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670a.bin
ce69ed509663c62f45aa1c59d85aa80eccec618a82bc1ec366f4a5cad65b8799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 5204 bytes
font_01_sfnt_off000078a6.bin
456b9705cbd5ab9a5c69add3a520c089b00a5d27e9d40eb8fad50782645a8286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 13300 bytes

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