Malicious PDF — malware analysis report

Static analysis result for SHA-256 3835aaa3b762ed6d…

MALICIOUS

PDF

52.2 KB Created: 2020-08-21 14:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61216991260d2d17169ced4b034dbbca SHA-1: f21630e2b012e37afbf1ee4d21e4aeb22c193d9f SHA-256: 3835aaa3b762ed6d0679d80552db9d82b67f5ab0365807f5342b624f8837f941
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=stream+ecology+lab+report', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating it is the primary lure. The file's purpose is to redirect users to malicious infrastructure.

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=stream+ecology+lab+report
    • http://nukomewux.aratiinternational.com/uploads/1/3/0/7/130740072/6917837.pdf
    • http://lizir.spmlsu.org/uploads/1/3/0/7/130775195/5646508.pdf
    • http://files.laurelwoodtroy.com/uploads/1/3/1/3/131378816/2e584780ef8febb.pdf
    • http://nogumo.thefightchronicle.com/uploads/1/3/1/3/131384244/fowatinurapudewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/47211290525.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/dakufimaten.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/holy_bible_catholic.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/figib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/fotope.pdf
    • https://cdn.shopify.com/s/files/1/0435/5892/8545/files/range_and_endurance_of_an_aircraft.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/exam_master_january_2020_download.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/
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/exam_master_january_2020_

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fe9.bin
0c6ca8e7fda8556a1d41c8f88edde0119d650bafb4b342f1ae28364074020e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 5052 bytes
font_01_sfnt_off00009116.bin
351a02ec870be8469f81eaa4d3ca48842f9db16ce0cdba2893584bd83f611572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 10748 bytes
font_02_sfnt_off0000b59c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB59C 4324 bytes

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