PDF malware analysis — malicious · 9f87f2e309a672b8

MALICIOUS

PDF

43.7 KB Created: 2020-10-05 01:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: dd6a4b746332640279f87dba4351504e SHA-1: acf8f652f24c84e216e4b66435e046a96ff2a11e SHA-256: 9f87f2e309a672b8b56e94590e9b69d9a6eb1ec7a3e2afedac03d01546e4d78a

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=density+of+all+liquids+pdf In PDF document text
- http://wolinig.avataraesthetics.com/uploads/1/3/0/8/130874601/8924662.pdfIn PDF document text
- http://zetijanu.friendshiphillnhs.org/uploads/1/3/1/3/131398252/39921a8.pdfIn PDF document text
- https://site-1036814.mozfiles.com/files/1036814/radarafipam.pdfIn PDF document text
- https://site-1038482.mozfiles.com/files/1038482/zudusomokalugekobimuguzi.pdfIn PDF document text
- https://site-1039785.mozfiles.com/files/1039785/xibizapenitakejitawuxufa.pdfIn PDF document text
- https://site-1039350.mozfiles.com/files/1039350/xexiw.pdfIn PDF document text
- https://site-1039385.mozfiles.com/files/1039385/fipikatatiwozuboxeloruzox.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/1/0438/3621/1357/files/duveridolif.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4305/2953/files/underhand_app_guide_not_working.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/0863/8106/files/zisazavo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/5821/7631/files/23965494244.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6540/1753/files/busqueda_implacable_en_ingles.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0470/9420/2526/files/nuxowidivivuva.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7897/4629/files/xutefamusefunopumiz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/8272/1701/files/bilowutuwazodonikamad.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_off00006d29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D29	5168 bytes
SHA-256: `96ca74d2f662cd8579314aa939f2ff84fb202eeaef7f335ebf9fab682cb67c51`
`font_01_sfnt_off00007edd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EDD	10344 bytes
SHA-256: `29e303148d270345155873dc9589668bf0098a6b852d8be44efbc207ae67b9a0`

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