PDF malware analysis — malicious · 679fec7f0940c11b

MALICIOUS

PDF

47.8 KB Created: 2020-10-28 21:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10

MD5: 67ce361fc87fb12d14141a753c987634 SHA-1: 6174377187f657f70d4d486dfd2f9545920361cb SHA-256: 679fec7f0940c11b5d455c1f059385b2c82fe4ff47057668f46e0a1e63bcc422

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://gettraff.ru/strik?keyword=business+management+aptitude+test+questions+and+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4379035/normal_5f8c112951897.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379219/normal_5f8ca1d6f3253.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367656/normal_5f8925417e290.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366642/normal_5f87bb375322a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385436/normal_5f98a1bb24e43.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367301/normal_5f8cbdf9d3d81.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367687/normal_5f887f4d63039.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377908/normal_5f8cc22070dec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366407/normal_5f89ab1b6b7f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375886/normal_5f91a8cfeea40.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383922/normal_5f8fab4cceb01.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378175/normal_5f8d7548690c3.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4247/9521/files/74737362852.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/6310/7480/files/rikemelojepaxilunu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e27da366-319e-4c65-a377-1c30c8ed63db/42774576477.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9bcdc84e-bf53-473e-a873-0e03083e9929/67112205882.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/4593/7048/files/nawibex.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/1602/6815/files/causes_of_apartheid_in_south_africa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/be8ebf7d-eca1-41e9-9bb0-a012f1e09369/25398547517.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/58860e88-204d-4709-9c10-b2815730b9e6/vuposipakatugav.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8233/3851/files/zirefujizefujibinatuj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a66c8548-2a96-43e9-91b4-cb18187b7b54/favokiwenumewirifeb.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eea51e9f-b2fb-4e12-85aa-22d3f04c8a7a/xonabowevakuzobapi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/15664160-a938-427c-b3c8-f8dd8abddf98/noxabikulagadunuj.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A55	5512 bytes
SHA-256: `b7d43efef17d383be6414c22c0c839bcbf96afd56d29c858259f59fe350181b1`
`font_01_sfnt_off00008d08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D08	10620 bytes
SHA-256: `d8f87fe3c50b95a844afaf141122a56dfad67d64dacf22c520cc9676a34f290d`

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