Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e196ef797df8efb…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 18:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9e27477a23542210225eaf80a5a101e SHA-1: 8d543c5b7d154b13282c41c53cbdb58b5812a64c SHA-256: 7e196ef797df8efbd3b37e58066e67106975003f20d4fc646863afa0b0e686f8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm designed for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting the document's purpose is to drive users to this malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=deadpool+kills+the+marvel+universe+pdf+kickass
    • http://files.susanadams.co.nz/uploads/1/3/1/4/131437249/9594412.pdf
    • http://files.eat2live2love.com/uploads/1/3/2/6/132696512/e1ef88fbd4a7b.pdf
    • http://files.personalized-treasures.com/uploads/1/3/0/9/130969936/jezapad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/sidimaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/pakepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30551251375.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2778/files/wasorifubemepir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/17900449034.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/misabupija.pdf
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/setunuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/nomibekuzisoferosurodex.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/nexavatumodukuwinopofabox.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/vavenugodevemegojokom.pdf
    • https://cdn.shopify.com/s/files/1/0440/4854/8005/files/degradacion_ambiental_en_mexico.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_off00004dea.bin
ee626ce5fc1a69ae5eaa91bfbb9314355bbd75f16a66063af853860b869d75e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEA 5520 bytes
font_01_sfnt_off00006086.bin
be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 6148 bytes
font_02_sfnt_off00007066.bin
9b08bb23a362aa438a35ea7b00675385fadd4694e9e916d4a5be22c46b3b5a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 10672 bytes

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