PDF malware analysis — malicious · e6d286a17dad9a36

MALICIOUS

PDF

44.5 KB Created: 2020-10-02 11:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 44eeb65b23b0f07840672790bfcd170a SHA-1: ea577e7aa059262ce2a60f0d8475092021c5c85d SHA-256: e6d286a17dad9a360a75c0c10f5cfd035004eb6e84e498df862475171ca5ad6c

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector services, indicating a link farm or SEO poisoning attempt. One prominent link directs to 'ggtraff.ru', identified as malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to harmful sites.

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=concert+band+sheet+music+australia In PDF document text
- http://files.tracyrobbsegal.com/uploads/1/3/1/8/131856907/xexezeze.pdfIn PDF document text
- http://tasefewe.niosha.com/uploads/1/3/1/6/131637021/b5aef1ec61.pdfIn PDF document text
- http://wemurud.mts-wines.com/uploads/1/3/2/3/132302868/mifunofusawexarafi.pdfIn PDF document text
- http://xomigop.ccmplbca.com/uploads/1/3/2/6/132681352/33faebf916.pdfIn PDF document text
- http://files.pointofviewmedia.com/uploads/1/3/0/7/130775429/3148868.pdfIn PDF document text
- https://site-1038565.mozfiles.com/files/1038565/3185908983.pdfIn PDF document text
- https://site-1037120.mozfiles.com/files/1037120/74784268810.pdfIn PDF document text
- https://site-1037920.mozfiles.com/files/1037920/nufikofegabobik.pdfIn PDF document text
- https://site-1038728.mozfiles.com/files/1038728/fokirupomolexidok.pdfIn PDF document text
- https://site-1039349.mozfiles.com/files/1039349/4137691695.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/c62b86d9-af76-4c58-9550-7ceeec10c712/dukafegudekowidobizoz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aef221a0-9026-42f9-877e-6901c16aea4a/gagovegam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/21326328-8877-41a3-900c-df232c065605/vuzezebukofufigib.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7880e348-d2c1-4ecc-a719-d0b59e0f725d/daxeruvisivofigofetok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0db96f29-66c8-43e6-8ee5-3e37a5a25800/63964845064.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b378c2fc-9c21-4bf5-81ff-27c58406e3a3/72682327611.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/212b11d2-9ea5-4f85-9375-bbaf9857aba7/91786015567.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_off0000623a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x623A	5224 bytes
SHA-256: `c7d2b1e0337c2b80e6c575eb5433e297227197e6e5d5fd5abd3798655253e9f7`
`font_01_sfnt_off000073c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73C0	10300 bytes
SHA-256: `0cf41c4f82f4e2d5675458875d2e0044a6b60d8f0fc55cb4f982351ef9581ea5`
`font_02_sfnt_off000096ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96AC	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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