PDF malware analysis — malicious · 10a769df88d0434b

MALICIOUS

PDF

60.8 KB Created: 2020-10-29 12:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 1ddda5e4725837df4de768dc0665c54b SHA-1: 3dc8a4f456968481a4c54b812cd572ad4cc697d3 SHA-256: 10a769df88d0434b26eb8e7daffcf09086f2902cd37a08a52d02e6ab60b5d895

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The document body and embedded link data indicate an attempt to create a link farm, likely for SEO manipulation or to direct users to malicious sites. The presence of a known malicious redirector URL and the ML classifier's high confidence score support this assessment.

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 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.
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=solving+rational+expression+equations+worksheet+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4379384/normal_5f9516558bb87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367643/normal_5f8ea6f546313.pdfIn PDF document text
- https://kuzikumivinoli.weebly.com/uploads/1/3/4/2/134235757/8701557.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409610/normal_5f94b585884e8.pdfIn PDF document text
- https://luzodogapop.weebly.com/uploads/1/3/4/2/134265842/xopin.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411489/normal_5f96c0c43dc68.pdfIn PDF document text
- https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/parikib-vexutu-forotusadukot.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/7048/1076/files/word_link_mod_apk_download_android_1.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/9150/0449/files/personnel_psychology_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/5944/4382/files/1418222891.pdfIn PDF document text
- https://s3.amazonaws.com/zaxuledo/jurnal_pembuatan_preparat_apus_darah.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/8522/6669/files/bilanebap.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/11557671288.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/9616/5534/files/ripizozafap.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9134/4026/files/2020_michigan_senate_race.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0492/3018/4601/files/85734684737.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/6474/1026/files/xagowiluvusozimituroner.pdfIn PDF document text
- https://s3.amazonaws.com/susopuzupure/fagodanur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/7456/7329/files/android_listview_with_cardview.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/5948/7135/files/63603244765.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000787a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x787A	3616 bytes
SHA-256: `9290eb2c8ffd88fa7c148230d2528c462f37230e2e9510234360404b8f78601a`
`font_01_sfnt_off0000858e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x858E	5596 bytes
SHA-256: `eec81df7a723977ecc939714a6f03c12ea53f1cf78389ae08a8382627e7f2ec6`
`font_02_sfnt_off000098a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98A3	2640 bytes
SHA-256: `ab949a88988c8cb844967a97130a45f9242c0d29604739bd768ab5e72f299cb3`
`font_03_sfnt_off0000a2a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA2A8	12120 bytes
SHA-256: `0653d8e39bb965f9670040b6c0fa1a59dc15ce91a34bf64351e339150e287926`
`font_04_sfnt_off0000cbf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBF9	16928 bytes
SHA-256: `e94f8c3065ae805525ec072291ede9872bc6afb5cf8ee88fbcc019bf176a7553`

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