PDF malware analysis — malicious · 85dbd43659cec91e

MALICIOUS

PDF

35.3 KB Created: 2020-10-28 18:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23

MD5: ba00cdff6fa7f103209dc288b5b41c25 SHA-1: 3239dca4c72cd412634295a334c0691eefa7c75e SHA-256: 85dbd43659cec91efefbd14f65f7ae46d4be9b06004a8b015a6af9aafffe9af9

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://ttraff.me/123?keyword=skinceuticals+phyto+corrective+gel+how+to+use In PDF document text
- https://cdn-cms.f-static.net/uploads/4387706/normal_5f8f43409d5d1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375088/normal_5f92261886dfe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390081/normal_5f8fcafe2ecdf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371523/normal_5f8d7b16b2a31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389568/normal_5f9529b598f5d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372721/normal_5f8abbbae2947.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381735/normal_5f8df9aec4169.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417648/normal_5f995eac55b4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375702/normal_5f8c283934604.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367013/normal_5f894cad3c3db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367687/normal_5f8763596d7a2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378161/normal_5f8b196ddd5e5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392444/normal_5f93f3c5b7a2b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365634/normal_5f8ef1b8e44fe.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/3ae03b0b-f89b-45eb-8fbc-f7c6ea2c0dc9/kopejomigaligevarabuwadi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4399161d-51c1-43f0-9e72-8994564722da/milosafajizexusobupiwonas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5494245c-0f1e-467a-8fd8-1c7efc6f8391/king_s_chamber.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0af31109-5703-4994-8078-976913ad2b1c/semevugagova.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/140a47d2-e6f9-4801-a5f1-2f16fe0dcc35/10824120900.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1ca90ca5-6308-480e-9174-fba0564ed801/94534520345.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/7125/7241/files/best_english_grammar_app_for_android_mobile.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3220/5722/files/bd_singh_genetics_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/8165/2155/files/guide_to_petticoats_and_piracy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0da265a1-ac05-40dc-abe8-ab2e8585d8e8/43836026689.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_off00004e43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E43	5616 bytes
SHA-256: `b3400d4a3beb5fab280402d5f1f12c3b43a9aac5bbad6cde865b04eba31c8841`
`font_01_sfnt_off00006178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6178	8784 bytes
SHA-256: `637b90bc6b75eaf20b8ffd9f037c6a0aabd8e7f6f0233d9ab57eecb2d70cb79d`

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