Malicious PDF — malware analysis report

Static analysis result for SHA-256 9579b299709dcae2…

MALICIOUS

PDF

50.3 KB Created: 2020-08-15 07:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7973c2ff2aa74f0a1ed6d90ba4fbee1 SHA-1: ae7e8085d0136c376c3884f22d3e5daa4ab3ade9 SHA-256: 9579b299709dcae26bee0473afef0d0aee8be6ab416f3b9a2114193a8fdfd2b8
150 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 redirector service. The primary link identified leads to a URL that is part of a known malicious redirector infrastructure, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to a worksheet, likely a lure to encourage clicks.

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.cc/pify?keyword=mean+median+mode+frequency+table+worksheet+pdf
    • http://jewefi.stemtech241.com/uploads/1/3/2/6/132682076/jafaso-kajago.pdf
    • http://files.theleantrainer.co.uk/uploads/1/3/2/6/132681264/gagegegapekog.pdf
    • http://files.khang-le.com/uploads/1/3/1/6/131606035/6361321.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/wojibimol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/butcher_block_florida_menu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/3867429044.pdf
    • https://cdn.shopify.com/s/files/1/0432/0165/9043/files/93299577151.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/zonubakoninomorezaliwile.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/94121547396.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/autoimmune_disorders_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/60461296753.pdf
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/dominio_archaea_definicion_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/49108872216.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/singularity_is_near.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/33136822453.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_off00008424.bin
2aa95bede0a91b1e91b83daa1a1b7c7004cc8afdfebe99986a3e6f0284d27644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 5924 bytes
font_01_sfnt_off00009838.bin
52088ff2d77312577185b19d7c3d833a017e21ccc3b99c6eebc1bbac601a4907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9838 10504 bytes

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