PDF malware analysis — malicious · 87a70a40545fe561

MALICIOUS

PDF

44.8 KB Created: 2020-10-08 01:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 19ca8dce1a59f50d246df10bbb3ae6e0 SHA-1: efa5be920b00ac5c0ff6db934c3a3c52e292c2fa SHA-256: 87a70a40545fe561e33718fe71b1dd6cb0f7043a24b25d5ee7430ae1fc742b45

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=finger+breaker+jelly+roll+morton+sheet+music In PDF document text
- http://biluj.pdemopoulos.com/uploads/1/3/1/8/131857114/a3a99d50204f.pdfIn PDF document text
- http://jipilepon.bouldercove.com/uploads/1/3/1/3/131380467/fixezazuvub.pdfIn PDF document text
- http://rerut.traceyknapp.com/uploads/1/3/0/7/130776132/6182988.pdfIn PDF document text
- https://site-1037169.mozfiles.com/files/1037169/5394158389.pdfIn PDF document text
- https://site-1039864.mozfiles.com/files/1039864/gapufomosem.pdfIn PDF document text
- https://site-1037115.mozfiles.com/files/1037115/pepuzipenibikovasat.pdfIn PDF document text
- https://site-1039707.mozfiles.com/files/1039707/9815797139.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/e8d95113-db7c-40a7-905f-679d007a5acf/6608033240.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2430a51-9707-469b-a609-def7535befdd/dedude.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/273e2090-c105-4414-aa53-126a8bed2712/32942235583.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0494/2518/6971/files/luxomexomokem.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4247/9007/files/sti_driveway_monitor_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8251/3561/files/kamotiroxamemari.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/8107/8686/files/saint_venus_theater_2019.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/3340/9174/files/pabejofusugutazenawi.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_off00006efe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EFE	5552 bytes
SHA-256: `d9ef04cbaaf95b86397b37b16b5e2a97724516078ee0c24350dd939735e68719`
`font_01_sfnt_off000081d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81D1	10596 bytes
SHA-256: `b81ad4dcfb8d9182fc1403c60db7c9f3f8b52abb9c9ef5af7b32b0bc072a9933`

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