PDF malware analysis — malicious · be3dd5b2b378d0b0

MALICIOUS

PDF

51.5 KB Created: 2020-07-29 01:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9add8dedb370b51f1737fb49659aa2e9 SHA-1: c082a588355fc50dc438ca29b7fbc6cc2375714f SHA-256: be3dd5b2b378d0b0da3bf8a6efe8000fb30f34d818c95c6829305aa796ecf3c6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=fantasy+football+rankings+standard+cheat+sheet'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. 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.cc/pify?keyword=fantasy+football+rankings+standard+cheat+sheet
- http://files.wordcraftoforegon.com/uploads/1/3/2/6/132682235/44f3077b5.pdf
- http://files.lbtdlaw.com/uploads/1/3/1/4/131484133/vipajejo_kafukigojol.pdf
- http://files.stbartshighsprings.org/uploads/1/3/2/6/132682235/kivarebesugofi.pdf
- http://files.stbartshighsprings.org/uploads/1/3/2/6/132
- https://cdn.shopify.com/s/files/1/0432/4907/4336/files/rozomamitatuw.pdf
- https://cdn.shopify.com/s/files/1/0432/6604/8165/files/10993487752.pdf
- https://cdn.shopify.com/s/files/1/0432/7096/3350/files/96557973384.pdf
- https://cdn.shopify.com/s/files/1/0429/6278/0311/files/52585740727.pdf
- https://cdn.shopify.com/s/files/1/0430/9480/2589/files/42201927632.pdf
- https://cdn.shopify.com/s/files/1/0432/3747/4466/files/20101395511.pdf
- https://cdn.shopify.com/s/files/1/0432/0778/6654/files/rikagakunitozutelugewo.pdf
- https://cdn.shopify.com/s/files/1/0434/1035/8439/files/manidimerokovof.pdf
- https://cdn.shopify.com/s/files/1/0430/9932/4580/files/47452100673.pdf
- https://cdn.shopify.com/s/files/1/0431/6289/4498/files/fulevere.pdf
- https://cdn.shopify.com/s/files/1/0432/2702/1480/files/37475067879.pdf
- https://cdn.shopify.com/s/files/1/0427/9851/4343/files/56541260035.pdf
- https://cdn.shopify.com/s/files/1/0431/9395/8560/files/35668493786.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008c48.bin` `45751f750d73920e04b9eeb808b1a035305198520aa6394feeaed3c79a868e13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C48	5332 bytes
`font_01_sfnt_off00009e65.bin` `d5cce29323dd4df1f0bfba0a0733491aa6f62729f7856d592b5edec293d3b8bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E65	9996 bytes

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