Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d14b51b3154548…

MALICIOUS

PDF

40.3 KB Created: 2020-08-16 19:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b7cd5be5bd1a27679a9491972899ce SHA-1: 3f1d717d08d9f7af08e6b53916a9ef4983b10f8b SHA-256: 31d14b51b3154548ab5176b1223737885515bf8d83c9a77e48f2f9b4e10cb8e4
120 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 redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the 'clown loach feeding guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector link is the primary indicator of malicious intent.

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=clown+loach+feeding+guide
    • http://files.curiousfleamarket.com/uploads/1/3/1/4/131409574/xovofujolinodan.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/1970683991.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/fopewugalanemugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/braving_the_elements.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/65038503231.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/totepowubavujubiwirob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/sexetedibuzesotafitoduv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/biology_questions_and_answers_form_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/sewov.pdf
    • https://cdn.shopify.com/s/files/1/0450/8614/6712/files/vlookup_formula_in_excel_step_by_step_with_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/39447875017.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/gotasisozixeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/xubodabifubeju.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/tizewevavedigu.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_off000061e1.bin
5cd350f3eb8c17b6c84e603eb22257b01cda5ad03107e2f2e50dc8c99c125e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 5004 bytes
font_01_sfnt_off000072f2.bin
7c6cdbf6eece67c632d858fb0bbd73b2eff9afdea067937b8862c8466de0bcd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 9836 bytes

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