PDF malware analysis — malicious · 3ebce917efdef254

MALICIOUS

PDF

55.3 KB Created: 2020-10-21 18:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 3e774429594df4869d0f7dd073964f9d SHA-1: 2bb7a36043bf287cf3654fdd6598882fa8e9d436 SHA-256: 3ebce917efdef254b7ae5d8f39f7d13769c6ea700d449e30e336ad9444aed3ee

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links directs to a known malicious redirector URL, indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/strik?keyword=exercicios+juros+compostos+resolvidos+passo+passo In PDF document text
- https://cdn-cms.f-static.net/uploads/4370762/normal_5f8a6c329b05a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368235/normal_5f87d25e92a7d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368964/normal_5f8dba44e237b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377938/normal_5f8b42a66fd93.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366408/normal_5f872c3133024.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376369/normal_5f8df1a6b9fe4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387417/normal_5f8d65760fe0c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365626/normal_5f871221bf23d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392867/normal_5f8e461351b02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380882/normal_5f8bfbec6cdf2.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/1/0435/5407/8871/files/routledge_handbook_of_public_diplomacy.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/9755/3064/files/3175222113.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4244/6231/files/29424071598.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0463/1216/1442/files/vietnamese_egg_roll_recipe_cha_gio.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4353/6541/files/89322020397.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c2c3f76-1edb-4d54-b40a-03148f09ad73/nuxudurunafuxatefivevifi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e9c9f0f-9c24-4527-829f-b49833245911/93064372586.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81653b2f-726a-429f-8460-903836e1e0d9/wufowusiliziguza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c653fabd-6af0-4898-a703-bd41d2eac9c1/55281883004.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9fea12e2-b103-4e66-bda7-a4d8916fdda6/92858260927.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3e754ae4-a46c-4791-858b-48a78710ea5f/dofil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e302ab55-868a-4b18-9bac-56cba1e856f8/batudil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7d65583c-e92d-4266-bc07-1393429d11da/xabalamugipusuminemuko.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f4bc38da-5ca6-45bd-910f-edb6306addbb/xulegelovow.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007ec6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EC6	5380 bytes
SHA-256: `2877b4d29c810cb0d3b8f6409a94d2821934bf9d722c2a1c2162fe2d55a991f0`
`font_01_sfnt_off00009107.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9107	12640 bytes
SHA-256: `869676c7da37d60661cba826ed5e3625cc7969f1fe0813bf015bab506b4978b2`
`font_02_sfnt_off0000b874.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB874	16096 bytes
SHA-256: `9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61`

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