PDF malware analysis — malicious · 93109d2f2e25eb46

MALICIOUS

PDF

53.2 KB Created: 2020-08-31 02:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d0c20dd4f45962fbfe2c5826999be0cb SHA-1: 1d2b5507d519efd8c4e2f6a2a7d83eace9990bca SHA-256: 93109d2f2e25eb464d14fd97d9463f48362200b24ccff0ad60c30b16ee5e7373

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior by including numerous external links, likely to manipulate search engine results or distribute further malicious content. The primary malicious URL identified is https://ttraff.ru/wix?keyword=aplicaciones+de+la+topografia.

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=aplicaciones+de+la+topografia
- https://static.usrfiles.com/ugd/bf650e_fc37ba1d95e04fc7b7e18b361f55b5aa.pdf
- https://static.usrfiles.com/ugd/f0e51d_707d62ccf83a4d168a7144424034cd7d.pdf
- https://static.usrfiles.com/ugd/1cc777_f4064396015a42a0b68d8e703c995203.pdf
- https://static.usrfiles.com/ugd/b8c837_05541944863e4a8cb301cb6a7e10482f.pdf
- https://cdn.shopify.com/s/files/1/0433/5117/9423/files/wudugibalimefe.pdf
- https://cdn.shopify.com/s/files/1/0434/5698/7303/files/sapirukidewip.pdf
- https://cdn.shopify.com/s/files/1/0431/4592/0669/files/fugifedexiniviziw.pdf
- https://cdn.shopify.com/s/files/1/0428/4809/2323/files/adjetivos_demostrativos_ejercicios.pdf
- https://static.usrfiles.com/ugd/b8c837_88218eff24bf439d88857ad7bd5bbd51.pdf
- https://static.usrfiles.com/ugd/63d3ad_16f6511d148a4049815838251df1e48e.pdf
- https://static.usrfiles.com/ugd/b8c837_afdb3d355c084b6fbd9f6a0f8fc19043.pdf
- https://static.usrfiles.com/ugd/9cc572_daed48cba040457e9f0b5a49ee013b8c.pdf
- https://static.usrfiles.com/ugd/1813b3_a74a0ced2df141e788044b6e9e872be9.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008e80.bin` `8fe2dbaf33889132e503a20687e2272bff2a038a8ebb3a27bffbbb50628e980c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E80	5312 bytes
`font_01_sfnt_off0000a093.bin` `832d5cbac86be0304b7ddb49334e745ab899b0748d1f6f2af75be4c78109ef17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA093	11688 bytes

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