PDF malware analysis — malicious · 3fc778c41174d2b7

MALICIOUS

PDF

44.2 KB Created: 2020-10-29 08:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 5853e4923d0ff0c5807cc441747f451d SHA-1: 96de5f4b5d0766c8cd10ed7f5d8e9c78310fd309 SHA-256: 3fc778c41174d2b7e5ce3e490354b2554be8502109162647008a8fa436639a29

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links pointing to external PDF files, indicating it functions as a link farm. One of the embedded URLs, https://ggtraff.ru/strik?keyword=that%2527s+not+my+name+gif, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The sample's primary function appears to be directing users to potentially malicious or SEO-manipulated content.

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=that%2527s+not+my+name+gif In PDF document text
- https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/5361857.pdfIn PDF document text
- https://gowosupene.weebly.com/uploads/1/3/4/4/134489802/rotunebevumabada.pdfIn PDF document text
- https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/5168611.pdfIn PDF document text
- https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/65eb3752.pdfIn PDF document text
- https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/3621501.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
- https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/kijevixe-bolovisosadile-mitilu.pdfIn PDF document text
- https://zavomori.weebly.com/uploads/1/3/4/3/134335150/b989625da92.pdfIn PDF document text
- https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/tasanovulubafe_gugewawovofanal.pdfIn PDF document text
- https://telisawe.weebly.com/uploads/1/3/4/4/134466193/1294699.pdfIn PDF document text
- https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/boxejopepogowatod.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
- https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/fikufe.pdfIn PDF document text
- https://sulajaxa.weebly.com/uploads/1/3/4/3/134362611/c5af1276bce467d.pdfIn PDF document text
- https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/2318081.pdfIn PDF document text
- https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/bawitarat_wikiximujekes.pdfIn PDF document text
- https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/bilixanexonix.pdfIn PDF document text
- https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/2186812.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/pisik/ximakeguzimejo.pdfIn PDF document text
- https://s3.amazonaws.com/wajibile/new_introductory_lectures_on_psychoanalysis.pdfIn PDF document text
- https://s3.amazonaws.com/gowebabuxogiro/structure_of_higher_boranes.pdfIn PDF document text
- https://s3.amazonaws.com/memul/46739197456.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F70	5140 bytes
SHA-256: `226627385d8eab060e7810826a748a352efb25382f62795fbea4efafc7d6483f`
`font_01_sfnt_off000080dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80DD	10152 bytes
SHA-256: `c93cc4ebbf09096ba7987e747e2e5eb949fbb531c8cc6c3ceed49af1e30f1339`

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