Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e4b2a2d96a852f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 03:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a046c4509d1b8fb63520debac8419084 SHA-1: 64c2bc4570ebb73198bd42bd26a9b90ad569e9c0 SHA-256: c1e4b2a2d96a852fe4a6da7dc6ffc0e784ed4550e12e93c7273c167409112c82
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous Shopify-hosted PDF files, likely to manipulate search engine results and increase visibility. The primary malicious link, 'https://ttraff.com/pify?keyword=pdf+express+download', is a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a malicious intent to lead the user to harmful content.

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.com/pify?keyword=pdf+express+download
    • http://files.shoptempus.com/uploads/1/3/1/1/131164473/8383390.pdf
    • http://files.cardasiscounseling.org/uploads/1/3/1/4/131437363/zopogog_dilivanij_gesofonododu_liwokojavi.pdf
    • http://files.rkspeech.com/uploads/1/3/1/4/131438249/9075954.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/how_compress_avi_to_mp4_ffmpeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/geteki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/71487824498.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/25717715478.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/dizixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/peladafawumabutufamiden.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/78336739777.pdf
    • https://cdn.shopify.com/s/files/1/0436/0791/6707/files/bolotalif.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/52343846346.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/10901059956.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/kefajebi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/30476211727.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_off00006826.bin
fa257550eb2f6d7e5ee5667647a8e1a39e94aefee4dda564c409e0ccc76b3e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6826 5196 bytes
font_01_sfnt_off000079fe.bin
f147d3b30bc73fdeab884e71a57f6eba8869dfb6dee13d2c02809ecf49016d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 10200 bytes

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