PDF malware analysis — malicious · e6559074277810aa

MALICIOUS

PDF

50.0 KB Created: 2020-10-17 05:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: 5be6d191177a625599389d0cee16abc8 SHA-1: 43d2f9bb49af403c5ec5aaea149d768ee381f511 SHA-256: e6559074277810aa53e7189ae70ba7d22667e79d6a9d5bdac0ae7d88d71000f9

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one specifically to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with a link farm or SEO poisoning attempt, likely to redirect users to malicious content or phishing 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/123?keyword=angeles+y+demonios+libro+completo+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4366014/normal_5f8a262b4a056.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366341/normal_5f87350a9ce95.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367642/normal_5f88bea36ca04.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368735/normal_5f8843f6e2797.pdfIn PDF document text
- https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/mogilu_zalavibadiba_poniwarapodax.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368486/normal_5f881be45f1a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365639/normal_5f8734bfca934.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368999/normal_5f8a18b0980a7.pdfIn PDF document text
- https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
- https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/jubewilupenajixemur.pdfIn PDF document text
- https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/5995606.pdfIn PDF document text
- https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/4038194.pdfIn PDF document text
- https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/loposozawupep.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://cdn.shopify.com/s/files/1/0430/7111/1330/files/84804208303.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/9127/1061/files/free_sports_tv_app_apk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/2016/7586/files/mopikivituzunosibux.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1882/9472/files/xiviwononimuzulu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28232e69-462f-48bc-880e-43e19dffdd3f/bofipipilixene.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/35c12374-9ad5-4c23-8800-58c5313e152f/66539892156.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/92bbb5ce-99bc-43fb-a8c4-21d6ebb2d86f/78648774213.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_off000073e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73E2	5284 bytes
SHA-256: `297bb51889c8eb86891872d38a7d041d4e280fb5b1a2569d0ae719de609a528e`
`font_01_sfnt_off000085be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85BE	11396 bytes
SHA-256: `47f23da5a25a93501db21854fc4596663b8b52de1aa4126cf633dde9fb19726b`
`font_02_sfnt_off0000aae8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAAE8	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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