Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f1bce0befedbdb…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 01:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c48226a64a17852d8e1dd34691059ba SHA-1: 33b7aec07b52859c1de8c91f3c005628d156b29f SHA-256: 79f1bce0befedbdba67470bd79a45638e5fcd8cd0f1893f6aa8491f0a7e3f511
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=blend+phonics+worksheets', which is flagged as a malicious redirector. The presence of numerous links, many pointing to Shopify domains, suggests a link farm or content distribution strategy, with at least one link leading to malicious infrastructure.

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=blend+phonics+worksheets
    • http://seloxuko.jebmotley.com/uploads/1/3/1/4/131454859/24b1a9.pdf
    • http://ninizevuz.daytoneyecareinc.com/uploads/1/3/2/8/132814742/1932835.pdf
    • http://files.ethanrmarshall.com/uploads/1/3/0/7/130738722/9aa6f29c89fab2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vizinedidobirefeguj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/xupezezapejimojelutid.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/swing_trading_simplified.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/dietrich_bonhoeffer_eric_metaxas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/70592727393.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/81939194727.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/lifujumegerenan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/irritable_bowel_syndrome_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/4013028411.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006488.bin
f43c3c4636b252422b6484477cee2cb5f50e5c8ead4763327aaa57baef5b4787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 3144 bytes
font_01_sfnt_off00006fab.bin
614e5b9d2987d21776fea70a746545b30a6aa5ef868e40795ee9f1f592520956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 5156 bytes
font_02_sfnt_off0000813e.bin
078e311bdabe9dd2bacf5a8f2bd0ea2160eed7b4a8f588eaab5c5579334878db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813E 10364 bytes

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