Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaecdc3a0899f498…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 05:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85974a813c64384021ea6ebe0cc1c790 SHA-1: 41827ed120a02c5b1dd9e36af57319bf7162f07c SHA-256: eaecdc3a0899f498b5fe3a4e67ac145ebeadbec17e8a4f6f4b522f30fd4deaf3
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, specifically pointing to 'https://ttraff.ru/wix?keyword=biological+psychology+12th+edition'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://static.usrfiles.com/...' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting the primary intent is to redirect users to potentially malicious content under the guise of academic resources.

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.ru/wix?keyword=biological+psychology+12th+edition
    • https://static.usrfiles.com/ugd/353d00_536562b3e16b45638f4d8b14afe48a58.pdf
    • https://static.usrfiles.com/ugd/76156b_62c9663f7566495780172f33a9d32b74.pdf
    • https://static.usrfiles.com/ugd/1d64af_dad5d4315eed47a9851e92206278d21c.pdf
    • https://static.usrfiles.com/ugd/5ecadc_75ac32e387944dcaac7a23c226578da9.pdf
    • https://static.usrfiles.com/ugd/de65f7_c94d4da7ab4e405b8d194837df443727.pdf
    • https://static.usrfiles.com/ugd/79e5df_6fc5b8b59b0d45258ad8a49f5edbb7c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7155f7c6b781428d89e675d6822e7004.pdf
    • https://static.usrfiles.com/ugd/63d3ad_f604bc038d8b4b6fa31060ff700fea88.pdf
    • https://cdn.shopify.com/s/files/1/0462/6671/2218/files/hades_star_trade_station.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/batomolisigarem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/pabesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/puxugasonidirukoxuxini.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/93949301429.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_off0000525c.bin
d1d6473ce3ca68b1202ec38331819ab234f2daf6e24bb539652a0361cea1739a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x525C 5572 bytes
font_01_sfnt_off00006552.bin
b126e92785f3079e635b0ea622ebf9dda81dcfe0adf8c836e3112a0a90edd145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 12056 bytes

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