Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf0f22619c814be…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 19:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71e63ffc8b5344e11000139428d7bbee SHA-1: 6199cfe6bf454fe67e50684dd635031f86d3aba2 SHA-256: 8bf0f22619c814be95f729f544dd511620f0c27715a8344523cd275d6767a666
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a link farm or SEO poisoning tactic to lure users to 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=4th+grade+math+textbook+mcgraw+hill+pdf
    • http://files.readthybook.com/uploads/1/3/1/4/131453086/gabubesagi.pdf
    • http://files.southingtonrepublicans.net/uploads/1/3/2/7/132740614/e9ff6b9865f.pdf
    • http://files.mulberryumc.com/uploads/1/3/2/7/132710783/ralolojik.pdf
    • http://files.neurology-u-tokyo.com/uploads/1/3/1/1/131164506/7742409.pdf
    • http://tigeluko.mistystevensbluegrass.net/uploads/1/3/1/3/131383483/2620353.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/79055846160.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/niwawave.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/53441178942.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/rudeturotulavapoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/23096766079.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/55761814117.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/kelijerok.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4885/files/69211318151.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/63215464803.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/zafugebaxoxogurawema.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_off00006472.bin
8e253154316513d66d9d1a1c2d37726b5fa9dc760bd0dde557ffcf915260d404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 5748 bytes
font_01_sfnt_off000077f9.bin
30426ef2431164d550d538b8a6732e87dcb91d3f81ec5fee289bab7b116faab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 10376 bytes

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