Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38157c62f2a148a…

MALICIOUS

PDF

34.6 KB Created: 2020-08-08 08:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b05da1c9a80c515112fa4680b9225a SHA-1: 45bc4b78bfdc0a083692271c2ac9be80b5e9b81b SHA-256: a38157c62f2a148a3c05fc080f10f52d1efad161cd643aadf78464deb0ba2969
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site. No scripts were extracted, but the presence of a malicious redirector and link farm strongly indicates a phishing or malware distribution attempt.

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=compendio+de+apologetica+catolica+jose+miguel+arraiz+pdf
    • http://files.smartdealz365.com/uploads/1/3/1/1/131163601/6894018.pdf
    • http://files.manifestmama.com/uploads/1/3/2/7/132740533/kusudajebuw.pdf
    • http://files.danburyeducationfoundation.org/uploads/1/3/2/7/132740204/1206072.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/6299959852.pdf
    • https://cdn.shopify.com/s/files/1/0438/5010/4982/files/gofivoti.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2369/files/votasigajakemuvusu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/sufibakepulojato.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/24166498221.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/academic_performance_of_students.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/decocraft_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/98395709011.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/rilejopo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/29004865132.pdf
    • https://cdn.shopify.com/s/files/1/0432/4150/4927/files/penyakit_albuminuria.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/mujowexitutenezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/logical_reasoning_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/arianna_huffington_sleep_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/analise_swot_exemplo.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_off00004a02.bin
307a267e93cb23aa3cb79a2d469e9d9d94916584d3448e7d81abe143cf8ac75b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 5504 bytes
font_01_sfnt_off00005cb4.bin
1f1c1b5fb6c0a2d0c1021ab1b1fb27e9f47263cd3302ca65152c6ee1b5ad6416
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB4 9368 bytes