PDF malware analysis — malicious · 171aa9ed358a146f

MALICIOUS

PDF

45.9 KB Created: 2020-10-16 05:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04

MD5: 8422a54eb5ee0fe4c26f08ea53b269f4 SHA-1: 1f58b7a957a8ad35a0c9f42887f91b93a17dbfca SHA-256: 171aa9ed358a146fa320b09f421c1a70e63962b0e313e4d642cbbdecc2b30ff5

184 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://ggtraff.ru/strik?keyword=best+video+editing+apk+download In PDF document text
- https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/sunutubevitadobux.pdfIn PDF document text
- https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/fedifafepawidak_torop.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ratefunerod.pdfIn PDF document text
- https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/575d6950ce6.pdfIn PDF document text
- https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
- https://site-1037074.mozfiles.com/files/1037074/vikulajanise.pdfIn PDF document text
- https://site-1038794.mozfiles.com/files/1038794/vipuvuresajinulen.pdfIn PDF document text
- https://site-1038565.mozfiles.com/files/1038565/6203720690.pdfIn PDF document text
- https://site-1038952.mozfiles.com/files/1038952/kefoxan.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368488/normal_5f887bad1f9c4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366662/normal_5f87286bb42e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368956/normal_5f88a1bc4b0c2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368998/normal_5f88f9ed0cc3f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366401/normal_5f8727a1cdf53.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374024/normal_5f88e7e3439cd.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/1/0497/2013/1745/files/kunobi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/2703/6322/files/3906322097.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/5115/5618/files/9149397377.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005efd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EFD	5296 bytes
SHA-256: `4229a965dd148d056336d6844256a3cfca03756ef2ce373f86e1e6f2ff1a3d4a`
`font_01_sfnt_off00007134.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7134	10128 bytes
SHA-256: `7ccafadb402d26b91288b340006ce602ad56f2cdca14041741d3fc2806b1c01b`
`font_02_sfnt_off00009420.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9420	16456 bytes
SHA-256: `008575b8736c8da5fea32a26cf89ba5038c5b7a367186361e1aea3681cd3b478`

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