Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33eeff8e554b7cd…

MALICIOUS

PDF

48.8 KB Created: 2020-07-30 10:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9dba5f8da8f3e891eafb7a505db6b2 SHA-1: 7d3c5d7cece67555668e41a8665a17b30abf84fc SHA-256: e33eeff8e554b7cdea79c6fefccc27b2d2a324a726d57d8b29779f355873cd80
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.ru/pify?keyword=characteristics+of+project+life+cycle+pdf', is flagged as a malicious redirector. The presence of numerous external links, many pointing to Shopify domains, suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=characteristics+of+project+life+cycle+pdf
    • http://files.wisconsinrobotics.org/uploads/1/3/1/3/131398099/jeragepegubuda.pdf
    • http://files.daunward.com/uploads/1/3/1/4/131437532/jaribosewabinorelote.pdf
    • http://files.springbreakkenya.org/uploads/1/3/1/4/131452942/wipozudetijizef.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/23171295077.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/67384193953.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0850/files/xopavoxamajofazibas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/76216944309.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/pibajemikoguxida.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6630/files/satekenabiboveramugijafun.pdf
    • https://cdn.shopify.com/s/files/1/0435/3005/9927/files/37975751435.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/fevupevabupesogiseto.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/zotilazepivek.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/14409468480.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_off000081b9.bin
c11aa2127ebcb5227147ff94734493f59df4cffacbc4e385bb32f1a5be8cf7d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 5128 bytes
font_01_sfnt_off0000934d.bin
cf21b4d5a55686017ea1ca45d1367d3281c921b52a3f4c1db0825d012340b029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934D 10000 bytes

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