PDF malware analysis — malicious · bfd2af433355a3cc

MALICIOUS

PDF

42.2 KB Created: 2020-10-08 16:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 5ec51a9d8990af53becf40858f2ca5bb SHA-1: 93a228dd5c28bd6a2887598bad224bab4856f29c SHA-256: bfd2af433355a3cc013972de458d29f5e48228845daf9e73b29e17d1730ffb41

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://cctraff.ru/strik?keyword=fingerpicking+guitar+songs+for+beginners In PDF document text
- https://site-1037899.mozfiles.com/files/1037899/54617765739.pdfIn PDF document text
- http://files.furkidsboutique.org/uploads/1/3/1/8/131857435/selupizezivolumixum.pdfIn PDF document text
- http://mowet.lovingmyhouse.com/uploads/1/3/0/7/130739996/d80c7cb760f.pdfIn PDF document text
- http://files.fcscommunitycouncil.org/uploads/1/3/2/6/132682833/rimitefusave.pdfIn PDF document text
- http://files.verticallyconnected.com/uploads/1/3/1/0/131071063/becc4f84.pdfIn PDF document text
- https://site-1039817.mozfiles.com/files/1039817/wanidatunaz.pdfIn PDF document text
- https://site-1037094.mozfiles.com/files/1037094/9835330532.pdfIn PDF document text
- https://site-1038525.mozfiles.com/files/1038525/dawibixuvasuxoxulememote.pdfIn PDF document text
- https://site-1038313.mozfiles.com/files/1038313/23728569915.pdfIn PDF document text
- https://site-1039494.mozfiles.com/files/1039494/26637026524.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/1/0428/0808/2599/files/monochromatic_painting_artist.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0731/9974/files/7365862540.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/1116/4320/files/apria_healthcare_complaints.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0441/2496/2968/files/55538096409.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4233/2057/files/ruvigeriz.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_off00006719.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6719	5308 bytes
SHA-256: `1816f309e205ee4c99e36763fb0723be0451b433442dc8e42be1f5b7d261ece5`
`font_01_sfnt_off00007948.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7948	10072 bytes
SHA-256: `11ca337a3f161033ee9668186bf61c6d5a46f98fda6386cee5abbd79cc4c455b`

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