Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4691cd88ed8586…

MALICIOUS

PDF

36.3 KB Created: 2020-08-20 06:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3afd0699d86f7b1e82595ab751f8c902 SHA-1: 72faca8f5c3989622e50c15a6ca6d2496583f3ba SHA-256: fb4691cd88ed85868daad0fc35fbd38016a684715b79868318fb6744f47d1695
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bioscope+apk+app'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0436/3295/1446/files/bestandsgrootte_verkleinen.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to direct 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.cc/pify?keyword=bioscope+apk+app
    • http://files.newlifechurchsf.org/uploads/1/3/1/4/131452838/4677047.pdf
    • http://files.autumnselover.com/uploads/1/3/1/0/131070313/kanemuki.pdf
    • http://giwodabi.mahlakiyaelblida.org/uploads/1/3/0/8/130814706/af8fd0.pdf
    • http://files.angieskonacoffee.com/uploads/1/3/1/4/131453100/9054339.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/bestandsgrootte_verkleinen.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/active_and_passive_voice_interrogative_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/36007986683.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fonufefijosogigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/wokirakojibalolon.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/98375773347.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/19459967148.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/95972095595.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.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_off00005234.bin
26a6e0894de936275dd4815375ae3febb7421a820be1a1fda9a063803636fd64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5234 4912 bytes
font_01_sfnt_off000062ff.bin
df20e57947cf75503815cae9863b34fea4c185d01401f3cd2c480368165fe399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 9932 bytes

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