PDF malware analysis — malicious · 8b757caa3181ff80

MALICIOUS

PDF

49.9 KB Created: 2020-10-17 01:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: f721657d2d50fd1c5d596b76f234d809 SHA-1: b60d298c871e911355565343c92f89ac4f712fed SHA-256: 8b757caa3181ff80ceb28ad936ea7c8264caebc099a7f0c3ec07ce224130f7c4

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=quotes+from+dante%252527+s+inferno In PDF document text
- https://cdn-cms.f-static.net/uploads/4369309/normal_5f89848024075.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366984/normal_5f875e588192c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366381/normal_5f876cc4e1c9f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368266/normal_5f8771d113dbe.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
- https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bofajifolapumalij.pdfIn PDF document text
- https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/70b5e2514cc.pdfIn PDF document text
- https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/b9ae3.pdfIn PDF document text
- https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/xetuvirabefun-tebura.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://uploads.strikinglycdn.com/files/e5ed20a7-984d-478c-8273-01fcf88cd6b6/61924391321.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/06c9e513-beb6-485a-8c82-92d255ecac11/82658634164.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/5557/3909/files/80339113147.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/8555/4345/files/91441176571.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/6590/8123/files/revolucion_inglesa_1688.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/5899/3573/files/corkscrew_roller_coaster_gif.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/8965/2648/files/19753158735.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/9231/1206/files/duzasa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/8540/7426/files/zejitasovolesifusuxetam.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/6995/1131/files/codigo_civil_puerto_rico_matrimonio.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a30e4a73-7ee2-466e-abfa-6294d7357b90/zokomitidazusegalovos.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0a03aa82-0b9f-4eb4-b10e-b8294e70516d/71907473947.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/39935d84-d99f-412c-a27e-6744158d0a17/38933254654.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_off000077c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77C4	5000 bytes
SHA-256: `52774c0e67bbdac87c648d719f34136ef8d48781cd40cddf67e922dda12b32a6`
`font_01_sfnt_off000088a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88A8	10504 bytes
SHA-256: `36264990d4c0c661900cc879b95a11a73b858e6a9302245bd80fb63473f33d96`
`font_02_sfnt_off0000abc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xABC0	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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