PDF malware analysis — malicious · 8ea8d6a9f728fef3

MALICIOUS

PDF

50.2 KB Created: 2020-08-19 16:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4cfb973920cecc8bb41992295dcc10c9 SHA-1: 792a81ad7f267b91e59174870e5652f71f26d53b SHA-256: 8ea8d6a9f728fef35182117abb36eac6eb7f9d64b09603bfef15da1a7c668bfd

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the embedded links, https://ttraff.ru/pify?keyword=cornell+system+for+taking+notes+template, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to note-taking templates and the PDF generation tool, suggesting a lure to encourage clicks on the malicious link.

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/pify?keyword=cornell+system+for+taking+notes+template
- http://jatuju.silfradentasia.com/uploads/1/3/0/7/130738971/ragon.pdf
- http://files.wisebeginnings.com/uploads/1/3/1/8/131857920/7004059.pdf
- http://files.stokegiffordscouts.co.uk/uploads/1/3/0/7/130776111/cdb653ff.pdf
- http://wudanopu.sierralovestowell.com/uploads/1/3/2/7/132712663/dovilugodi-wazufures-bonuzakij.pdf
- http://files.neverthelessshecomposed.org/uploads/1/3/1/4/131438617/cf36acaec.pdf
- https://cdn.shopify.com/s/files/1/0429/1241/5911/files/finacle_core_banking_system.pdf
- https://cdn.shopify.com/s/files/1/0447/3038/4537/files/best_spyware_remover.pdf
- https://cdn.shopify.com/s/files/1/0432/9419/5870/files/rakamugafifapudon.pdf
- https://cdn.shopify.com/s/files/1/0437/9059/8305/files/91548446135.pdf
- https://cdn.shopify.com/s/files/1/0435/8812/4829/files/bicolano_dictionary.pdf
- https://cdn.shopify.com/s/files/1/0429/4901/7756/files/65346219775.pdf
- https://cdn.shopify.com/s/files/1/0431/1416/8487/files/67889901581.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
- https://cdn.shopify.com/s/files/1/0436/5221/9030/files/30118062520.pdf
- https://cdn.shopify.com/s/files/1/0430/9070/6589/files/mpdf_page-_break-_inside_avoid_not_working.pdf
- https://cdn.shopify.com/s/files/1/0433/2060/6885/files/54717752436.pdf
- https://cdn.shopify.com/s/files/1/0434/5643/0230/files/68336237735.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/1/0433/2060/6885/files/54717752

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008650.bin` `b48a596a04c6ce2589b624c8b8bad8ab8181a7069342b486be1b6e5d829292a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8650	5292 bytes
`font_01_sfnt_off00009848.bin` `1d4c475caad7e420647769564c9b815e07da1b51783535ec33eeaab0ea8963bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9848	10264 bytes

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