PDF malware analysis — malicious · cedcbb27b1a34660

MALICIOUS

PDF

64.2 KB Created: 2020-08-14 12:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a1bd82df481f9b2f2ac8736cd7b1718e SHA-1: 1768c4fecf464ca95628c1ac1aa29912ce002433 SHA-256: cedcbb27b1a34660295a8479fc869c7a88b522cf9da8aa7765cff8bd68b2511d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests a mass external link farm, likely for SEO manipulation or to host malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=scrying+sheets+spike
- http://files.carpetcleanoahu.com/uploads/1/3/1/3/131383602/zefot_tujopopafodaja_kojubutujara_xapesiwuka.pdf
- http://files.mortoncc.org/uploads/1/3/0/7/130739027/genopa.pdf
- http://bisojo.lodgefarmleisure.com/uploads/1/3/2/8/132815176/gizufolawigode.pdf
- http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdf
- http://files.brandygwen.com/uploads/1/3/1/3/131384777/6adaac5c9a9e.pdf
- https://cdn.shopify.com/s/files/1/0432/1542/1600/files/97046573382.pdf
- https://cdn.shopify.com/s/files/1/0431/2920/8992/files/50513739189.pdf
- https://cdn.shopify.com/s/files/1/0428/4963/2415/files/jejoviwivufulenujejuzim.pdf
- https://cdn.shopify.com/s/files/1/0431/9795/6256/files/wobimafi.pdf
- https://cdn.shopify.com/s/files/1/0435/6397/4805/files/ferupololokegokepewuwuluk.pdf
- https://cdn.shopify.com/s/files/1/0438/8470/7992/files/73315222938.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/lawegixokotafigutad.pdf
- https://cdn.shopify.com/s/files/1/0434/0393/5900/files/emma_busta_nutt.pdf
- https://cdn.shopify.com/s/files/1/0429/6795/7660/files/6344123781.pdf
- https://cdn.shopify.com/s/files/1/0452/2527/9648/files/bangla_onubad_ebook.pdf
- https://cdn.shopify.com/s/files/1/0434/4794/3330/files/african_christian_theology.pdf
- https://cdn.shopify.com/s/files/1/0430/8310/4409/files/selidimur.pdf
- https://cdn.shopify.com/s/files/1/0437/4416/6037/files/uric_acid_test_procedure.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_off0000be1d.bin` `7db86125f4756709bd54f57d9e12308b8f9b10b5ba1b45c334905fbeee7e0c09`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE1D	5224 bytes
`font_01_sfnt_off0000cfe2.bin` `9c72c7e1c7778967f5f46a6610c0081418a755d6588e72ce1f02a7519ea9be1a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFE2	10496 bytes

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