Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f2a39360f2cf12…

MALICIOUS

PDF

53.4 KB Created: 2020-07-29 11:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8804d3ea0dda2c1528d08be6203a1fc6 SHA-1: 6bcd5bb1a8eca34d460d4c569827ca6fb78b3b42 SHA-256: d7f2a39360f2cf128c56133f7ab5f6747c3eb2e90b5cf2f6196c41c89f825b10
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'difference between negotiation mediation and arbitration pdf', suggesting a lure to download a seemingly legitimate document. The primary malicious IOC is the redirector URL.

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=difference+between+negotiation+mediation+and+arbitration+pdf
    • http://files.opobusiness.com/uploads/1/3/1/3/131384401/3294b62945a62.pdf
    • http://files.honeyinthewoods.com/uploads/1/3/0/9/130969980/98123.pdf
    • http://files.gwrra-iowa.com/uploads/1/3/0/7/130740212/8168a7fc6.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/zezeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/53008731068.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/21496350239.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/nifitoxakatidug.pdf
    • https://cdn.shopify.com/s/files/1/0439/0063/3243/files/difimadux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/romumawaxulemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/70041852980.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3475/files/letolemajuvavezabopof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/fesekolezar.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/paruk.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/fosig.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/suzilasatekotigubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/jizijijebatelulijumijuf.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_off000092ad.bin
97ebb6998d540b938204ccea0bbfa231af86cde102870bc2d811a8eb3b83f594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AD 5284 bytes
font_01_sfnt_off0000a49c.bin
4f7152c998a8543deac6ec3e3bcc688b02c1671eb7bf1f1ee696c01711f1a540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49C 10224 bytes

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