Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff837d35ebf3b664…

MALICIOUS

PDF

34.8 KB Created: 2020-08-28 02:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d2ffb1a54b42e099aa999645135acea SHA-1: d3a2ec6fc4e26ed7344450a5b0c3bb03b177d664 SHA-256: ff837d35ebf3b6648fa0dbea425e83fa4eca19d55ed76b284f06c7d4d4608061
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=topaz+stardew+valley, which is likely used for phishing or malware delivery.

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=topaz+stardew+valley
    • http://files.peterthurstonclassicjaguar.co.uk/uploads/1/3/0/8/130814106/sopegijeti.pdf
    • http://buwokux.ryanwesleygilreath.com/uploads/1/3/1/6/131607310/454bd65.pdf
    • http://zolubi.studio6works.com/uploads/1/3/2/6/132680813/kewelabolexabekukid.pdf
    • https://cdn.shopify.com/s/files/1/0434/2854/4668/files/july_2020_calendar_canada.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/bahishti_zewar_complete_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/kudepumumosukotililub.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/aluminium_6061_t6_properties.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/agriculture_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/dowaguwipukabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9607/files/kuxow.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/51186590733.pdf
    • https://cdn.shopify.com/s/files/1/0458/1664/3750/files/software_deployment_checklist_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/xaxumawejepezasepuka.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/zaramimuramovu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004561.bin
0152f3aae5837fcfe6e10f0abb0e2a53bc8dcd3e46cd1f76046027a47c2470e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4561 5208 bytes
font_01_sfnt_off00005746.bin
bd6bd0202f6740c355e49d230145ac09078a4a44d3b257bb2e00f1223da3db15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5746 14344 bytes

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