Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00367ac7c905485…

MALICIOUS

PDF

44.8 KB Created: 2020-07-31 21:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f3fdc49e0fbffe880f10ed2f47d7e6 SHA-1: 04415e345ace3c88c4a8fd47a485d231f45094df SHA-256: b00367ac7c9054858014f9c8bcea6b0d54c93e5b8ccd21e35f1b387a99724685
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to viewing text messages and a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a link farm strategy to distribute malicious content.

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.com/pify?keyword=view+text+messages+online+sprint+free
    • http://files.packupallyourdishes.com/uploads/1/3/2/6/132682892/numexevefeke-worasusebukigo-wifajavigate-benokakadoze.pdf
    • http://files.encounterweightloss.com/uploads/1/3/1/4/131437445/4108098.pdf
    • http://files.jamielanesweets.com/uploads/1/3/1/8/131872055/218054294d54.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/sirenarepu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/10841128949.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/morovevomarodapobafoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/tazapixapisirumiguxiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/guwomulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5850/files/4916108266.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/92672523221.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/butetumeziziloxuwar.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/tigezemudevujinokit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/75832295791.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/gelekaxuwid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/gulusulowefar.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_off00007113.bin
912be9bf52bdaeb21d497fff9ecd92feb8d507b7b0b60c633147cb223cc6e5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7113 5348 bytes
font_01_sfnt_off0000834b.bin
3ae4e6b36fdcd39431c1dae8d7d943f4a221cfa0206e4f32116cda3366287ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 10080 bytes

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