Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87a7588d0a62340…

MALICIOUS

PDF

70.0 KB Created: 2020-08-05 16:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7393089c1895b96af96cbd54a8c1afe1 SHA-1: f166805f2a2ff1bd829e11beac5568080f6fa810 SHA-256: b87a7588d0a623404a6b1e5e21b35f59891b63c4cfe65653ccd0b6c29715089a
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bootstrap+3+glyphicons+pdf', suggesting a lure to trick users into clicking malicious links. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and potentially distribute malicious content. No scripts were extracted from this sample.

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=bootstrap+3+glyphicons+pdf
    • http://files.irongates.co.nz/uploads/1/3/1/6/131607075/fukoxitadimaleranal.pdf
    • http://files.mischiefandmayhemcentral.ca/uploads/1/3/1/4/131453255/tirefuzawufuz-vunesa.pdf
    • http://files.cornwallplants.com/uploads/1/3/1/3/131379506/loxelavomalekutu.pdf
    • http://files.portlandwatersports.com/uploads/1/3/0/8/130813851/5e9be.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/mathematica_scientific_notation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/jipusadanobu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/advanced_excel_formulas_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/jivebozavasivonujumad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6569/5638/files/siwimenolagexevefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/72794952884.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/saronenesulexiwama.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/pobiselexojovozatukizamaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/sql_server_2020_administrator_s_guide_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/mulomexewuziwapanana.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18d.bin
4adce5b81e315bbce72a94a6ae541b84dc49fb8638b051bb3bb491a5d1796944		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 5732 bytes
font_01_sfnt_off0000d516.bin
42d62e886ff61996887d6bcad18c85a7cd9982eb37fd43e5c5c5c1e078f0b2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 17348 bytes

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