Malicious PDF — malware analysis report

Static analysis result for SHA-256 59839ef077c8cda4…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 01:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73857bd4928d80694f0c02d06d1e5753 SHA-1: 0d23ddbb46d771d32676867f3e446a364d6f5efd SHA-256: 59839ef077c8cda470275536bfc3d148d67b44b2244595ffd4d9831cf0316dd5
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a thesis and the malicious URL, suggesting a lure to trick users into clicking the link. The SE_INVOICE_LURE heuristic further supports the idea of a deceptive document. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=online%20restaurant%20reservation%20system%20thesis%20documentation%20pdf
    • http://xudogavi.thebodytech.net/uploads/1/3/1/4/131455069/boxaxe.pdf
    • http://files.whiteroseartstudio.com/uploads/1/3/0/7/130739039/7713686.pdf
    • http://files.beneshieldfinancial.com/uploads/1/3/2/6/132681836/ecf8c.pdf
    • http://files.barnbrave.com/uploads/1/3/2/7/132740260/mabemi_goworimokapago_bivoz.pdf
    • http://files.nicaraguaforchrist.com/uploads/1/3/0/8/130874246/jimusefufigupub.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/pekova.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/luzak.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/wuvoponarepetom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/5199049695.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/94539417112.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/46970468176.pdf
    • https://cdn.shopify.com/s/files/1/0448/3537/3213/files/garment_manufacturing_technology_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/delete_branch_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/everstart_battery_charger_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/gutepijodosiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/lifebon.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/82205744224.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/nios_assignment_front_page_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/22975786667.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4064/files/git_delete_commit.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_off00007aff.bin
9089230fab27df9bcf475a6feaca5221fdbe42a51528fd2dc23a6f6db86af62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 5584 bytes
font_01_sfnt_off00008dde.bin
1ec0e3c541b6bdf42c157babee997d75b950fae534cf7114a248592910027e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDE 10616 bytes

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