PDF malware analysis — malicious · 7f2b1730936dea24

MALICIOUS

PDF

43.0 KB Created: 2020-10-28 07:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: cf64ae1377f6f4c93469da1f9c2b744a SHA-1: bacb2096681cee04f867bbe1eaed004dab31b4e5 SHA-256: 7f2b1730936dea243ea560517016bf92c21c55c4ff8094da8489a78194ecfdc4

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, 'https://ttraff.ru/123?keyword=what+is+a+beaker+measured+in', points to known malicious redirector infrastructure. The document appears to be part of a link farm, likely intended to manipulate search engine results or phish users, and is therefore classified as a Spearphishing Attachment.

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://ttraff.ru/123?keyword=what+is+a+beaker+measured+in In PDF document text
- https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/xudobetutovexotixak.pdfIn PDF document text
- https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/pinolexetod-winive.pdfIn PDF document text
- https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/5815946.pdfIn PDF document text
- https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/e1ad4eb23.pdfIn PDF document text
- https://lotijilakoda.weebly.com/uploads/1/3/4/4/134468432/jefug_jasopu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365546/normal_5f8c219c90520.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371014/normal_5f8d42c0f4118.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371010/normal_5f9661a5d44b0.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/henghuili-files2/jufonuxukusegurid.pdfIn PDF document text
- https://s3.amazonaws.com/mejifavo/tiwuwobifujuvunenu.pdfIn PDF document text
- https://s3.amazonaws.com/gotenukevepunin/strona_bierna_i_czynna_angielski_wiczenia.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7715/2151/files/rose_tyler_doctor_who_season_11.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7772ea5a-b6a2-4fe5-9357-6b84dcb71f3f/38247972882.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/007f2c6b-151d-4555-aa62-1432325f8876/vusadezarikasuji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7840adb-bf0b-4bf6-9951-65db7c68c3a3/fodejapalavumatepu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3dbedb5c-ec57-4c2d-8bb4-6baa350bbc97/14071031867.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae21f494-ee1f-4cc8-bb7e-f55244fe7380/manganas_a_pie_2018.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_off00005e1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E1C	2900 bytes
SHA-256: `10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a`
`font_01_sfnt_off0000685f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x685F	5252 bytes
SHA-256: `69b9d86d620ba7ae29baf4d1dad4c5bb069efa0661e469ebe9870d98a28aae8b`
`font_02_sfnt_off00007a18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A18	10904 bytes
SHA-256: `6eae2deb96f58bf9ccc9b50887c9ebb9d697a393555a2e34206d2d346401d681`

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