Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea12c38519e8da…

MALICIOUS

PDF

33.7 KB Created: 2020-08-30 13:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90c016336cfdca0d30d1c5714de55973 SHA-1: 40585cbb07cd94904f8b7facc30e2367bd162157 SHA-256: faea12c38519e8da03c83ee8cd4036cd43661c490e25e34ba6c07a21d6a96994
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'contemporary management 8th edition ebook' and a URL that appears to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=contemporary+management+8th+edition+ebook
    • https://static.usrfiles.com/ugd/29c71c_8c82e999951c46878911c2f9e496cfcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d92bc9f4daa4d878bcc42df02d6ec80.pdf
    • https://static.usrfiles.com/ugd/9c43ec_628c2c516c9b4624ab4bed2a63ab9f02.pdf
    • https://static.usrfiles.com/ugd/b8c837_612b827bc8e34a2eb1d2979b865c90c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d515192de7704c9095ab0ee63e908235.pdf
    • https://static.usrfiles.com/ugd/b8c837_01fac31c07364ba190484afae6da9376.pdf
    • https://static.usrfiles.com/ugd/238140_40d99541003743a283f90b7aa6cf2546.pdf
    • https://static.usrfiles.com/ugd/63d3ad_dab461317f3945c6b54991c554a1ea43.pdf
    • https://static.usrfiles.com/ugd/a18aa6_6f6dac7606e44570b7e67a827187e697.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/susigowaxadejesoja.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/78836061085.pdf
    • https://cdn.shopify.com/s/files/1/0430/9090/3193/files/gilder_lehrman_apush_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/3929/1554/files/cancer_cachexia_understanding_the_molecular_basis.pdf
    • https://static.usrfiles.com/ugd/696117_71e663ebd8ab41fdba35ef5ef9fb6ce8.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_3d0bd60e6d91404bba2e8bb7bd56f447.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd461d227334486cb00d8ddb7b81d9d7.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_off0000481f.bin
ac7c6fa24756a7c5c9407aa26e166d30a948785c9381e04a4636efc972c35b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x481F 5568 bytes
font_01_sfnt_off00005ad5.bin
70c238da7016ebba4507dc1477e6fc8b271340750ce298481ae27f2a09e0d31e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD5 9228 bytes

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