Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3996e9a99b8363…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 08:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b841416423d25b83ff2136ed6cd8fcd SHA-1: 701d4fae6ee8b5761d2d3c11bb71ff5d8541d493 SHA-256: 2a3996e9a99b8363e99d82b5b0fe4aab7e0f4f9fd187ab67c917f4fb18ce734e
150 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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious content. The document body contains garbled text and a URL that matches the malicious redirector, reinforcing the attack pattern.

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=phonics+phase+3+oi+worksheets
    • http://files.purposeplayllc.com/uploads/1/3/1/4/131453453/207971.pdf
    • http://files.starplanappliances.com/uploads/1/3/1/6/131606672/bemotudisi_limurakeva_bufifidexi_bixazazunasixij.pdf
    • http://files.iamc94.com/uploads/1/3/0/7/130775633/wigikurenek-segaxopi-giwujepomugef-rogimuroj.pdf
    • http://files.witsendartstudio.com/uploads/1/3/1/4/131453615/4102162.pdf
    • http://funorofaz.ripeta.com/uploads/1/3/0/9/130969627/zupagikaruzam.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/atividade_epileptiforme_o_que_significa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/runumawomugumutisamesili.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/across_the_bridge.pdf
    • https://cdn.shopify.com/s/files/1/0454/2077/3544/files/panasonic_ceiling_fan_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/cyclone_baby_bash.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/lofosofelujotufizopato.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/santa_banta_wall_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/21268140467.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/california_adventure_park_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/vilotizibuwi.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_off000045ea.bin
7a0d5b5f32c76799a213c5147de04a93270e896b73f42e13634bb9006861eeeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45EA 5308 bytes
font_01_sfnt_off000057fb.bin
2a8dd6c22e3dfc7f88323c2e142d21983e4b2bdbe3cd7b5d1d9b02936d97dd5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FB 9848 bytes

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