PDF malware analysis — malicious · 5932fcde58b12e72

MALICIOUS

PDF

50.4 KB Created: 2020-09-07 11:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9bc8ee702bb0a33afafc9318e90e70c SHA-1: 5cdb6ff7594f46e5941d1077c0fb9f3216d9482e SHA-256: 5932fcde58b12e729889c1410bf3a2887c3a430051c66e68978e8c2191865c38

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a high number of embedded links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.me/pify?keyword=2+decimal+places+worksheets'. The document body, though heavily obfuscated, also contains this URL and references to '2 decimal places worksheets', suggesting a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.me/pify?keyword=2+decimal+places+worksheets
- https://static.usrfiles.com/ugd/39cb9d_da6bc28f6e1e443caaea9115ca7b0d38.pdf
- https://static.usrfiles.com/ugd/d017d5_7b466a52a09c4a1496f56a3c327ebb0c.pdf
- https://static.usrfiles.com/ugd/b8c837_237568de05904230a47c5cca5fd92d27.pdf
- https://cdn.shopify.com/s/files/1/0432/1797/7504/files/34459971185.pdf
- https://cdn.shopify.com/s/files/1/0432/3573/7755/files/kuxos.pdf
- https://cdn.shopify.com/s/files/1/0427/6856/4380/files/tulaxuzimigafarimofulojab.pdf
- https://cdn.shopify.com/s/files/1/0435/0096/1947/files/14855084457.pdf
- https://cdn.shopify.com/s/files/1/0435/2920/7957/files/.pdf
- https://static.usrfiles.com/ugd/436160_d9310db99689472d9c79aed07df4da14.pdf
- https://static.usrfiles.com/ugd/f1780b_52c52c4dc9d247359483927763f11563.pdf
- https://cdn.shopify.com/s/files/1/0437/7241/2055/files/mideboxematenipinebavo.pdf
- https://cdn.shopify.com/s/files/1/0464/0912/1960/files/mifadobejilo.pdf
- https://cdn.shopify.com/s/files/1/0432/6588/4313/files/32997809348.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0000936f.bin` `c2f29ce9c69fe0366a1d8136dcebbb37c5a1b4355ee079aea81a2023404433e0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x936F	17892 bytes
`font_00_sfnt_off00005e43.bin` `8028c8109eb1cd7a8a9b362ace299ac2791a66815062711e22de35788336374c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E43	5188 bytes
`font_01_sfnt_off00006fe7.bin` `080343d09afe4bde5ae9674d3b52c429da622ca806645475c7979ff2b1b53722`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FE7	10308 bytes
`font_03_sfnt_off0000ae84.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE84	4324 bytes

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