PDF malware analysis — malicious · 550cb780ce36a5c4

MALICIOUS

PDF

57.2 KB Created: 2020-10-28 16:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: b1b7f19eff4eb7e0fd60ff279dab6385 SHA-1: 3958b48124e3e2adcf7dddddffb3933e27e5079f SHA-256: 550cb780ce36a5c41cb211ee595d9419ce41841323763ecc9e8559710c9d9602

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating it's a malicious redirector link. The embedded URL points to a domain known for malicious activity, likely serving as a lure for users to click and be redirected. While no scripts were directly extracted, the nature of the PDF and the embedded URL suggests an attempt to lead the user to a malicious site, potentially for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 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://gettraff.ru/strik?keyword=monster+hunter+world+kulve+taroth+weapons+cheat+engine In PDF document text
- https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/xuwigasemo.pdfIn PDF document text
- https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/fuzeletu-vepelitixofop-ronuv.pdfIn PDF document text
- https://xerukarikudi.weebly.com/uploads/1/3/4/3/134316935/c5dfe94584d.pdfIn PDF document text
- https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/jurit.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401545/normal_5f95186e1874d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367301/normal_5f8f1d48669e1.pdfIn PDF document text
- https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/tonufederodewa-gexaravuwoxaw-xemonofufubi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389107/normal_5f8fc9a152185.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://s3.amazonaws.com/guvovigo/bajaj_boxer_150_service_manual.pdfIn PDF document text
- https://s3.amazonaws.com/pizexopenaxu/77135753680.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8086c413-3a49-497e-87f3-2f5cd2d288af/no_sonrias_que_me_enamoro.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6147/7527/files/no_drama_discipline_workbook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b74c878e-1457-4dbb-8694-3e3751ab1982/dokadunutaxavamexusizemuw.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/geluden.pdfIn PDF document text
- https://s3.amazonaws.com/jijumupade/who_is_responsible_for_simons_death.pdfIn PDF document text
- https://s3.amazonaws.com/vuraradaso/spinal_cord_compression_management.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/4520/3351/files/langston_hughes_weary_blues_youtube.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97247fb3-adc0-4d87-8dd9-6593b65d7b2b/69187012680.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_off000079f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79F8	5436 bytes
SHA-256: `647a2348e03683d6b212c4462b62fb149426cc39e3854376bb637dca9cfabe06`
`font_01_sfnt_off00008c87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C87	10900 bytes
SHA-256: `dce3457447439982bac69a9f41191d98013269e7f67699f526a98e31ce06b675`
`font_02_sfnt_off0000b1e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1E2	16076 bytes
SHA-256: `8fcf7d472a4b0d62256976ba9c9365efcb5766005c004dfa6cfd0e704c7d0063`
`font_03_sfnt_off0000c68c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC68C	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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