Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2776fdaf76453b8…

MALICIOUS

PDF

33.7 KB Created: 2020-08-04 18:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5983d9c00c891a4365b9d9e653fc460 SHA-1: d1d60767354caaf97e906f7b0ca76ac527ab48e5 SHA-256: f2776fdaf76453b81664f725e5cbabd661b23b1b20d187fc9c532b2298ebcf79
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 of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body also contains the URL for this redirector, indicating a clear intent to lure the user to a malicious site.

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=wordly+wise+book+5+lesson+7+pdf
    • http://files.krakauertaggduo.com/uploads/1/3/0/7/130740517/jizenuvawif-nuwofiba.pdf
    • http://files.lauraavnaim.com/uploads/1/3/0/7/130775917/3387943.pdf
    • http://womuxasat.maryslittlegems.com/uploads/1/3/1/6/131606201/kavilupofegixud_kufasiluk_mefabuvak.pdf
    • http://files.christmasallyearlong.net/uploads/1/3/1/4/131452942/561ed.pdf
    • http://files.shellyberryoriginal.co.uk/uploads/1/3/1/4/131483108/49e7ac8c66ba.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/xulikotom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/wirokokanomude.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/tegisaneluzofefesezugedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/79665381652.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/mogevevatedew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/23692576360.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/tafalafufinatesexop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/jeevan_lakshya_833_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/vireke.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/xopafudederaxolitudovuz.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_off000047e9.bin
2d72b1ddad55ba9a378f9e9f981b60d1f4ac560651c49c6f2cefa35831648e22
pdf-font-stream PDF embedded font (sfnt) at offset 0x47E9 5440 bytes
font_01_sfnt_off00005aa3.bin
07f3b78a74fb19a564d9ceb52a85d135d920fccb52fed67a68192b302778ec99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA3 9204 bytes