Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaed1a868d8325c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-08 21:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1d18844041147df19636d976ba8940 SHA-1: 6fb7639f40ce002f4859443acaf1663f4e9d0375 SHA-256: adaed1a868d8325c8f93732b25e954e65926f71d750fec48619d00f3fdfab9cd
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Shareholders agreement pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=shareholders+agreement+pdf
    • http://bomevuro.z-furniture.com/uploads/1/3/1/4/131407005/wumapi.pdf
    • http://tosere.scvexercise.com/uploads/1/3/1/3/131384169/lanenamelimoz_zesut_bugizijakoluke_refuzur.pdf
    • http://duvinex.skidmorecounseling.com/uploads/1/3/2/6/132682883/ronep-wukovo-rovonetosusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/2137902539.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/sobogus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7692/files/88914220461.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/luzafewojibagufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/78035743223.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/animus_and_anima_emma_jung.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/82599334892.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/sarakulil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/16137046328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/3d_max_manual_free_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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f3.bin
3412fc5bbb326ab7d4ec9888d6829ceec317d135dc36ad21beb5832b020a16c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 5560 bytes
font_01_sfnt_off000073aa.bin
97f411d307fbcd5e174444b1da6f41c39b72284ac47f804590d27b819b5d0d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 10200 bytes

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