PDF malware analysis — malicious · 854540f7eb956f25

MALICIOUS

PDF

51.6 KB Created: 2020-10-15 00:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: ba5d20b2ee77ed679dc7188c27a2f3a5 SHA-1: e7873c75695773a80768bf25e8af90f8719d87d6 SHA-256: 854540f7eb956f25318354d2eb5b739193d38ca661f280b17b7a74517d32c222

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://ttraff.link/pify?keyword=nicolas+de+oliveira+installation+art+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4365607/normal_5f8744203d5af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368226/normal_5f876b7b036ee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365551/normal_5f8767ba56da5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366057/normal_5f876b546335e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366367/normal_5f876a05da542.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366952/normal_5f876764de5ac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365602/normal_5f876aec130d9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366305/normal_5f8739d1ae766.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/1/0500/5780/5984/files/eureka_math_geometry_module_1_lesson_3.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6604/1244/files/pickaway_county_clerk_of_courts_circleville_ohio.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0462/7342/9661/files/wewikofir.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/3646/7619/files/lowam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54a2d51e-461d-4f4a-813f-2147589bb590/bazenuwesakozi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0a8d347e-bb65-48e8-8332-ae8ed1d4e202/jodutonoj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/efb9f568-614f-46ea-97fc-f3828a7bebbd/93530120654.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cad0e3c5-e189-4822-b726-c708a320054a/64686086325.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f7fecf18-a74d-4856-838d-291666de8289/86179258640.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/571f6a6e-02a1-474f-bafe-29875e3a0434/sagilejugizade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ac6f1920-8108-4a57-997a-83d255064c7f/pipefewudolul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/13e17ba0-ba81-4a52-befa-410423556020/fitedowexudog.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2debe646-7386-44e6-9925-98da07e007a9/54512437213.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2e8bb0d9-a7b8-4829-bce9-0885a1194176/91187943186.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000070ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70AD	3676 bytes
SHA-256: `30e7ca2009a649aa148962d55cea8026fb6176dddf6a790324fabb54f1a98f8e`
`font_01_sfnt_off00007d98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D98	5176 bytes
SHA-256: `dc1b6cfe9b7604031244c7a61a57209f197ba768e34c92f672e621d406d9889d`
`font_02_sfnt_off00008f3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F3E	15680 bytes
SHA-256: `b67b92ba619db2506cb6470acf521cbdd44b67c093cb4fd4ac2e2bd45df8c2bd`

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