PDF malware analysis — malicious · f9a05e6815f1eaee

MALICIOUS

PDF

33.5 KB Created: 2020-11-02 21:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9a7a273f8866736a0c767a616bd873e7 SHA-1: 123d2b9bbd5c6f72cc3457db0ddc54407b9adb74 SHA-256: f9a05e6815f1eaee01313a2220925074f0a1ca6e7548b6a9d2cfbecd906f7e90

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially benign files, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the primary goal is to redirect the user to malicious sites, likely for further exploitation or phishing.

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://ttraff.link/123?keyword=run+man+4+unblocked
- https://cdn-cms.f-static.net/uploads/4366331/normal_5f968f556b0f3.pdf
- https://cdn-cms.f-static.net/uploads/4383475/normal_5f9e6886635b1.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0488/0685/4821/files/nusujumuvoretimavijukis.pdf
- https://s3.amazonaws.com/tizowodifi/older_singer_sewing_machine_manuals.pdf
- https://s3.amazonaws.com/xanebavifamopez/74666977729.pdf
- https://s3.amazonaws.com/fajixe/duwikimajidavaritusodun.pdf
- https://cdn.shopify.com/s/files/1/0434/2045/0972/files/ganededa.pdf
- https://s3.amazonaws.com/nujosuwemedadi/xexujidalofuxunujeduwe.pdf
- https://s3.amazonaws.com/jukezeluf/pijiku.pdf
- https://s3.amazonaws.com/dogazisuze/bsc_chemistry_syllabus_tribhuvan_university.pdf
- https://s3.amazonaws.com/tetazino/taller_equidad_de_genero.pdf
- https://s3.amazonaws.com/susopuzupure/50699964359.pdf
- https://s3.amazonaws.com/babuxufarizuxur/kikabajegudulebugomarid.pdf
- https://s3.amazonaws.com/jebokizez/6th_grade_math_textbook_mcgraw_hill.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000483c.bin` `edbebc0ad7cea60e8a9c78a49c7d04036bef983242d29c1ff79b3b4f67cb9af9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x483C	5112 bytes
`font_01_sfnt_off0000599a.bin` `13a0196920f2736f579139835d282d6ddb23d6d54af8113054c73e3fa4be32e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x599A	9384 bytes

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