Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f09719422316d22…

MALICIOUS

PDF

73.9 KB Created: 2020-08-04 18:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 427b3bea4d149683063dc57fc8ff7543 SHA-1: db114473582989d9fa530b65b089c7c91c0aad7d SHA-256: 4f09719422316d22328610cd70152f3f21de1acde0cb9b0db5e1a5c791695bde
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the string 'bed rail assessment pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=bed+rail+assessment+pdf', indicating a lure to a malicious site. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute 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=bed+rail+assessment+pdf
    • http://files.carmeldachshundclub.com/uploads/1/3/0/7/130739809/666fbd327a04.pdf
    • http://files.peoplestories.net/uploads/1/3/1/4/131409677/tuwazakugurade-sugow-wupikof-kevepefiz.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.blackwolfknives.net/uploads/1/3/2/6/132682882/9a9fea.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/97269136768.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/ladunojilered.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/13533293228.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/24126614419.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/33381381422.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/merge_files_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8845/files/20955631428.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/aaron_lewis_country_boy_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/bewivujomurixupu.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_off0000daa7.bin
13290d8806320aadef656db8bc4661069d5690ce183250d2a0ceb7235442fc9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 5236 bytes
font_01_sfnt_off0000ec5f.bin
ed0d34b7a91267ec83f3e75c4dcfab13b495e32195560cf9d402e75795880d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 14768 bytes

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