PDF malware analysis — malicious · 705fa69f9a619bb8

MALICIOUS

PDF

38.2 KB Created: 2020-08-30 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0779cb1d1e6807d108a0a5d51e99f0f8 SHA-1: f958b0810dbb316ba772cfa0198ca3b408d4e720 SHA-256: 705fa69f9a619bb8b31c615c9515f86cb785a7e2095caa63870bfe5c024764b7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is identified as malicious. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm for SEO manipulation or malicious redirection.

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.ru/wix?keyword=etapas+de+proceso+enfermero
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_2c20278505c14891a2e7a81577fb5f91.pdf
- https://static.usrfiles.com/ugd/d2cc1f_f28d80f43cc34d5f966cff1ebc744657.pdf
- https://static.usrfiles.com/ugd/b8c837_55c95d7425094209b1bd0b0057209363.pdf
- https://static.usrfiles.com/ugd/10e3af_e9059f5789674d44b2597f0758bf5440.pdf
- https://cdn.shopify.com/s/files/1/0430/9201/7305/files/merosiletulomefil.pdf
- https://cdn.shopify.com/s/files/1/0429/9636/7511/files/canadian_idiot_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0436/8711/6965/files/antenna_theory_and_design_2nd_edition.pdf
- https://cdn.shopify.com/s/files/1/0431/9684/2142/files/17164417734.pdf
- https://cdn.shopify.com/s/files/1/0435/8832/1443/files/buick_enclave_reviews_2011_consumer_reports.pdf
- https://cdn.shopify.com/s/files/1/0434/2356/3925/files/60618474554.pdf
- https://cdn.shopify.com/s/files/1/0435/9127/0563/files/gunajufebar.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.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_off000057c2.bin` `934306105ba3a511a3a123c09a38c86d018116e7f0d04aca2e6a3950899b9b12`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57C2	5228 bytes
`font_01_sfnt_off00006973.bin` `f7fd083d15beda7ae855593db3d29cb6b27b3228d25d11946c560a6f28758b1c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6973	10296 bytes

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