PDF malware analysis — malicious · 7f343bad2ba96f0b

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 03:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a89b544d2c6ed4135f2c6d525c3fb0ed SHA-1: e7c45ea789d6b8dec23f301cd5c8b96d1c7e3abe SHA-256: 7f343bad2ba96f0bfec52f9e040ebe1dcfd72ae9187c2eaf74e5e1cfc22f2031

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded links, including a known malicious redirector at 'https://ttraff.ru/pify?keyword=beep+sound+ringtone'. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm structure, suggesting the document's primary purpose is to host numerous external links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=beep+sound+ringtone
- http://files.linensandlacefabrics.com/uploads/1/3/0/8/130874309/totivajuxuguw_goxujodakejido_kiromizip_razexija.pdf
- http://fojixejel.wpbluebirdfestival.org/uploads/1/3/1/3/131383332/nuroxerepojufifexu.pdf
- http://files.ourcrazyratadventure.com/uploads/1/3/1/6/131606280/f0a14.pdf
- http://fezuse.conniemorey.com/uploads/1/3/1/6/131606490/kabujivexej-panobokena-musaradezusuf.pdf
- http://files.dzabahe.com/uploads/1/3/1/1/131163684/8622296.pdf
- https://cdn.shopify.com/s/files/1/0438/5426/6533/files/gunuxinofofeniza.pdf
- https://cdn.shopify.com/s/files/1/0434/3994/7932/files/lipolo.pdf
- https://cdn.shopify.com/s/files/1/0431/0673/0144/files/gukametafunaxo.pdf
- https://cdn.shopify.com/s/files/1/0431/7921/2959/files/101_algebra_problems.pdf
- https://cdn.shopify.com/s/files/1/0440/3511/3110/files/australia_visa_application_form.pdf
- https://cdn.shopify.com/s/files/1/0451/0951/0297/files/miracles_happen_brian_weiss_free.pdf
- https://cdn.shopify.com/s/files/1/0448/0958/4802/files/86781313303.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0533/files/94454440617.pdf
- https://cdn.shopify.com/s/files/1/0433/1329/9620/files/91711436580.pdf
- https://cdn.shopify.com/s/files/1/0434/2507/1256/files/nefidufared.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.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_off000067be.bin` `f9c48ec99203094a8dbb2850a43e99c05e986c07ba090c10dfbb0b3c1a96d1e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67BE	4932 bytes
`font_01_sfnt_off00007893.bin` `4b82bc8b70f939899570d2a33986fac6a5fda61a8029e987912a67437f10dab7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7893	10392 bytes

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