PDF malware analysis — malicious · 6aec03910e43dbbf

MALICIOUS

PDF

53.4 KB Created: 2020-10-02 00:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: d4f4712bb968cf74c2676b14a165d02e SHA-1: c75875fac8a875642d46755601bdf9e7090ddfac SHA-256: 6aec03910e43dbbf2314adc803acb26e6e91adfbacbc5718d0896e901cca6ff0

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=functional+analysis+pdf+book In PDF document text
- http://files.dcmea.com/uploads/1/3/1/8/131872298/dezeka.pdfIn PDF document text
- http://levalu.unifiedtaekwon-do.com/uploads/1/3/1/3/131398455/3400894.pdfIn PDF document text
- https://site-1037241.mozfiles.com/files/1037241/vopibezugidexefeke.pdfIn PDF document text
- https://site-1039000.mozfiles.com/files/1039000/70805141251.pdfIn PDF document text
- https://site-1036627.mozfiles.com/files/1036627/57968303224.pdfIn PDF document text
- https://site-1037227.mozfiles.com/files/1037227/69970548341.pdfIn PDF document text
- https://site-1037074.mozfiles.com/files/1037074/43516546243.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/1/0433/1284/0872/files/lakeshore_family_medicine_hamburg_ny.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2249/0532/files/bemufimozuzagowogo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/2318/5566/files/gemimarag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0436/1884/files/troy_bilt_horse_repair_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5661/0979/files/4880615326.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/9880/7202/files/5746613565.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/3157/1879/files/kawetikutefinadonatun.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/8560/5280/files/xokunolunewudog.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_off000094bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94BF	5316 bytes
SHA-256: `a536129dc20c6002c314fa085c9b5276ee918f289412be26cb4e8276093c4305`
`font_01_sfnt_off0000a6f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA6F5	10036 bytes
SHA-256: `9640e7c6a7f9f45591a5eb0e8ad02d23287ac83d2a30376e4d715067d641b175`

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