PDF malware analysis — malicious · d96597b79f64ab4c

MALICIOUS

PDF

50.2 KB Created: 2020-08-23 01:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b35fbfdbf0c5da7b68cdb981275b0d8f SHA-1: 1dba3427c607113a7fda4ebd2aed45f7ec8a5349 SHA-256: d96597b79f64ab4c7973f1be44865b3f648ca1151bb68c2e7a1d855e0904d637

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious verdict.

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=pediatric+hodgkin+lymphoma+treatment+guidelines
- http://files.sailingforhome.com/uploads/1/3/1/3/131379719/kegume-debarupuw.pdf
- http://rikemu.palmettohighschoolalumniandfriends.org/uploads/1/3/1/1/131164250/1625912.pdf
- http://files.instantresultswithkate.com/uploads/1/3/1/4/131438538/lotexidesodupul-bawiluzov-samugurali.pdf
- https://cdn.shopify.com/s/files/1/0437/1644/4315/files/25868443115.pdf
- https://cdn.shopify.com/s/files/1/0435/2717/6343/files/rewrite_exercises_b1.pdf
- https://cdn.shopify.com/s/files/1/0432/7954/8574/files/64127175429.pdf
- https://cdn.shopify.com/s/files/1/0428/9832/5663/files/24266226862.pdf
- https://cdn.shopify.com/s/files/1/0430/8720/0418/files/74952262515.pdf
- https://cdn.shopify.com/s/files/1/0430/9018/2297/files/90172805663.pdf
- https://cdn.shopify.com/s/files/1/0428/7895/9775/files/58243651268.pdf
- https://cdn.shopify.com/s/files/1/0432/1571/6516/files/zizafobekoxoziwidapo.pdf
- https://cdn.shopify.com/s/files/1/0431/3363/2661/files/30589657624.pdf
- https://cdn.shopify.com/s/files/1/0431/6764/5857/files/vokatuxom.pdf
- https://cdn.shopify.com/s/files/1/0428/8095/8617/files/munef.pdf
- https://cdn.shopify.com/s/files/1/0437/7408/3233/files/kitani.pdf
- https://cdn.shopify.com/s/files/1/0432/7053/7374/files/wetowuremujixejajowigofux.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/1/0437/7408/3233/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008511.bin` `2905de370063d2f692714311e372223b56083850693c9985100b8b7b05423ffd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8511	5656 bytes
`font_01_sfnt_off00009821.bin` `34e70f6612a3e3d98515054c331fbc65c2bfe9679111685a0efc2134a34f2664`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9821	10208 bytes

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