PDF malware analysis — malicious · 5a8891e714988ee9

MALICIOUS

PDF

61.7 KB Created: 2020-10-15 06:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04

MD5: f8a28f97de1f26f1c7e150e76b8cf84a SHA-1: e0f0bfd1372e525b0ac4084cee93f26aa5f7ff5e SHA-256: 5a8891e714988ee90563b2936b1a47919efdee9af4bfe972cb0ee0e4b875c4d2

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/123?keyword=best+graphic+design+software+for+android In PDF document text
- https://cdn-cms.f-static.net/uploads/4365563/normal_5f87c50a24f19.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369491/normal_5f87b8e2b39d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366007/normal_5f870fa7cb40d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367961/normal_5f879c859cfc7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366358/normal_5f873cfb3ce4d.pdfIn PDF document text
- https://site-1048220.mozfiles.com/files/1048220/sowalunapofubowokamotag.pdfIn PDF document text
- https://site-1037160.mozfiles.com/files/1037160/54069584645.pdfIn PDF document text
- https://site-1037135.mozfiles.com/files/1037135/dodidetonoxax.pdfIn PDF document text
- https://site-1041688.mozfiles.com/files/1041688/16023390188.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366630/normal_5f872e62f2cc1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368970/normal_5f879b5d239c6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368735/normal_5f87a3decb88a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366010/normal_5f87b5ba59547.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/f41ed9f9-8dbc-40fb-a2cd-fd1026ce888d/fubulosifome.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/de415603-6acf-4ca6-8ecf-d1ae4050776f/18331774507.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0a97ad3c-9099-42ee-9616-6dc621723cf4/72927007491.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b6ca0a79-501a-46a7-9659-c5fbea827214/dajagugugotewimaxexuwefi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f14eac03-0885-449a-af01-4acd7ee957eb/lidedijuvabowizixijunat.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/0522/3327/files/granny_hack_mod_menu_apk_download_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/2069/9813/files/rockford_illinois_newspaper_archives.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6740/0601/files/fasibudawogikepuxu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9235/2932/files/20709038812.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51e9a06e-b8a5-44f1-879c-937f49e010ce/10893397279.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/13173462-87a1-4ea8-bbab-8201c9df0d36/sitamuxevopusojegulum.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_off0000b29d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB29D	5528 bytes
SHA-256: `c5b752b4af6891e04a07e9f0fd831db03f9af7df2af6536e252b3dad18d20017`
`font_01_sfnt_off0000c56e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC56E	10364 bytes
SHA-256: `9364b4da3b2360b647980fdeece310f4badeb43bea70cdd57fe47227c423a286`

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