Malicious PDF — malware analysis report

Static analysis result for SHA-256 4334765a305181ae…

MALICIOUS

PDF

56.3 KB Created: 2020-08-04 21:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f515ffb681fa498cacff4edd4218da SHA-1: ebbac5df41abc6a15dbd87fc71eba195bf078221 SHA-256: 4334765a305181ae112a41f1abc92c04f5f9444ee66be5bc7ed33e1c0add8a21
120 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 a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a malicious redirector link to 'https://ttraff.cc/pify?keyword=algebra+math+pdf'. This suggests the document is designed to redirect users to malicious content through a series of links, masquerading as an algebra math PDF.

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.cc/pify?keyword=algebra+math+pdf
    • http://files.mermaidinforeignwaters.com/uploads/1/3/2/8/132814071/kizal.pdf
    • http://files.torontoflowergallery.com/uploads/1/3/1/4/131453555/8625456.pdf
    • http://files.drdavidmurphy.ca/uploads/1/3/2/3/132302859/japodafajigawode.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/55137020069.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/82612785841.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0521/files/depifawitixaxefoda.pdf
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/89625430907.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/ribugugarasuvitutaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/risukunovexefubiru.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/pwc_financial_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/ti-_30xs_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/xepoxaful.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/vojaxesak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/nuxejimepuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/partnership_capital_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/62046197432.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_off00009456.bin
17fd45b175514d3b7edf2b8ada686e5e2e20db723442f72c244162e0bbf6641c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 5408 bytes
font_01_sfnt_off0000a68c.bin
fe9070329e7f168f1a2537e5db46ef58f49adc2074235966c6413addcc799b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA68C 14268 bytes

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