Malicious PDF — malware analysis report

Static analysis result for SHA-256 e340b30f7eb3a50d…

MALICIOUS

PDF

46.3 KB Created: 2020-07-29 08:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edec4c5300606860f044c1d35cf8b01e SHA-1: ceb0b56e72761715559ac71508e9fb78a4195b6a SHA-256: e340b30f7eb3a50d741ecbeca4953b1f930e9e7f160cead31ae9789e011ab996
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to medical conditions and SEO terms, suggesting a deceptive lure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The PDF also hosts a large number of external links, many pointing to Shopify domains, likely as part of an SEO link farm strategy to obscure the malicious intent.

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.ru/pify?keyword=type+i+chiari+malformation+radiopaedia
    • http://files.herpingsuriname.com/uploads/1/3/0/7/130738568/bcfc4.pdf
    • http://files.mercermovercompany.com/uploads/1/3/1/4/131437513/5865199.pdf
    • http://files.malkaschallheim.com/uploads/1/3/2/6/132682829/018602.pdf
    • http://files.stpatsyouth.com/uploads/1/3/1/3/131379060/nojexusezolepivukila.pdf
    • http://files.pontoonbaptistchurch.org/uploads/1/3/0/7/130738993/femibegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/15581568122.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/wewagilapajabunoves.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/suseregubenepub.pdf
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/86624355497.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/47892676377.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/10336972387.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/36753671490.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/buruveriragivebowav.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/wixeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/38188354518.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/49167944743.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/1/0431/5892/9570/files/47892676377

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007758.bin
5cebd462624318bbae4ad3806b5e02c0cb3c81cbef54c1a2ee15149feb321ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 5056 bytes
font_01_sfnt_off00008864.bin
1bcd1fe943b3de023b3f264b3af6392123f7d0173d58aa70ef56cf39be73bfb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 10872 bytes

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