PDF malware analysis — malicious · 51d27f95e0df0384

MALICIOUS

PDF

55.5 KB Created: 2020-10-15 06:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: d924367105e7d3d21f6465e8803b7278 SHA-1: 6d3415aa5ff765c27d1b3bc41bc20a7d850e7a44 SHA-256: 51d27f95e0df03841a4f013afe2d961fe6962f1ab23915187bd6806ff806cf59

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://ttraff.ru/pify?keyword=video+voice+changer+apk+download In PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
- https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/8678239.pdfIn PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
- https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/29932f71.pdfIn PDF document text
- https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/zosirenekufitu.pdfIn PDF document text
- https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/4421359.pdfIn PDF document text
- https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/kepikebivelufu.pdfIn PDF document text
- https://jivexine.weebly.com/uploads/1/3/1/3/131380908/gomanezibarubagujik.pdfIn PDF document text
- https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/6977354.pdfIn PDF document text
- https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/2766802.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365608/normal_5f8795c918493.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368249/normal_5f878240c458f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368747/normal_5f87b9327bb48.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366311/normal_5f87802f2ad29.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365591/normal_5f87679800814.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366036/normal_5f8757180cfa4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365608/normal_5f8723ff185c1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365551/normal_5f8754871e671.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/3eade6c4-92eb-4489-9e80-fa8ec8e09bcf/wotelidipudajezesumuwube.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4c441a1-270e-486d-a692-96d02315709c/gemokukotejupibogekinujal.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1a937d33-8d82-4cb8-9600-017b34b79e2f/birudomojepoleve.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000067fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67FE	5336 bytes
SHA-256: `94be125ca4de8229a6b45803b70f29cf84f47f462cf86be83332bdb79a9e880e`
`font_01_sfnt_off00007a2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A2B	9624 bytes
SHA-256: `86653af87261a77bb334d1721f624cda932f739de51b52dfdf308dc1334c0c92`
`font_02_sfnt_off00009581.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9581	10488 bytes
SHA-256: `0c7a2e583ee222cd2ceb7573677daec06b9c3ebc664fc0058216dd07b5afe88d`
`font_03_sfnt_off0000b9ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB9AE	16368 bytes
SHA-256: `552e926f59ef53231249b6015cc51882b512f7a40c6b17c25f707dc25a221893`

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