PDF malware analysis — malicious · 4e54c8cb41f427ab

MALICIOUS

PDF

47.1 KB Created: 2020-10-01 12:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 771afc99c2f96d00518d89bf1c21ea2d SHA-1: 30a9b95c1441d919ade113b4aae043facbb6d8de SHA-256: 4e54c8cb41f427ab4c8aee08eea5fa426d059aa27ce24297d32248a98c9d4c3b

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=adobe+after+effects+cs6+basic+tutorials+pdf In PDF document text
- http://rupap.maieutic-arts.com/uploads/1/3/0/8/130814283/nijanopigafovu_suxitab.pdfIn PDF document text
- http://navevo.pinemeadownursinghome.com/uploads/1/3/1/3/131380433/854167.pdfIn PDF document text
- http://files.maryjanescott.com/uploads/1/3/1/4/131483343/6fc0f8e8de.pdfIn PDF document text
- http://kinafo.avarmsbooks.com/uploads/1/3/0/8/130813528/gugutexanovuxawewum.pdfIn PDF document text
- https://site-1036816.mozfiles.com/files/1036816/34793438475.pdfIn PDF document text
- https://site-1036819.mozfiles.com/files/1036819/88280194200.pdfIn PDF document text
- https://site-1036881.mozfiles.com/files/1036881/duvuxasamebubevesaduxovuz.pdfIn PDF document text
- https://site-1036855.mozfiles.com/files/1036855/gexisin.pdfIn PDF document text
- https://site-1037902.mozfiles.com/files/1037902/28705063501.pdfIn PDF document text
- https://site-1036957.mozfiles.com/files/1036957/wuduguf.pdfIn PDF document text
- https://site-1036830.mozfiles.com/files/1036830/74582576766.pdfIn PDF document text
- https://site-1036993.mozfiles.com/files/1036993/lekinudoveraminaxexep.pdfIn PDF document text
- https://site-1037055.mozfiles.com/files/1037055/jujixanosojonepemipinamo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0477/2170/9724/files/bedakuzezazujare.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5283/3695/files/92288040350.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/4452/3162/files/chains_novel_vocabulary.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6232/0536/files/78456727736.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_off00006c83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C83	5208 bytes
SHA-256: `93e28d61e7b366feede61fb875d162dd8ee4e0990782fa74162912153293182f`
`font_01_sfnt_off00007e48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E48	10048 bytes
SHA-256: `aa8df6a6962d507494e2b81e0c40daa64ca50c4bb19c6960b3b791e3d611bb0e`
`font_02_sfnt_off0000a0a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0A7	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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