PDF malware analysis — malicious · 5b5efc3d94f2cc5a

MALICIOUS

PDF

43.0 KB Created: 2020-09-05 22:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 09c98ce2fb5fcf3625aec30c534ae4ef SHA-1: 946faa4a1d9135d07b495ee31bb55db22d8ba005 SHA-256: 5b5efc3d94f2cc5a02ee3da29f969777d752c6e91b3ddf8cd85c9e983b6c1b07

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to unit conversion and a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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.me/wix?keyword=unit+of+measurement+conversion+worksheet
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e1a791_1a00f091eaf04521a251bbe572077a3d.pdf
- https://static.usrfiles.com/ugd/d6b5da_04e1bf32f15f49dabc21641337234d9e.pdf
- https://static.usrfiles.com/ugd/b8c837_bc25def020a549a4badb8957350bcc05.pdf
- https://static.usrfiles.com/ugd/55f640_7f530d024bf643c298261f7401766aa8.pdf
- https://static.usrfiles.com/ugd/f59309_81c96ef2878b4bfeadb513b454d664c6.pdf
- https://static.usrfiles.com/ugd/0adedf_7b5530a3cd5f4123ba2a4eb3f06fe3ed.pdf
- https://static.usrfiles.com/ugd/1c8c6c_ff550af95b9d4092bc5efda0b0b7c5ad.pdf
- https://static.usrfiles.com/ugd/9cfd0a_2c4f50fe907042d7975b36d52b888771.pdf
- https://cdn.shopify.com/s/files/1/0435/2697/9739/files/48800485798.pdf
- https://cdn.shopify.com/s/files/1/0429/0792/6687/files/fibre_cement_flooring_sheets.pdf
- https://cdn.shopify.com/s/files/1/0439/1596/8667/files/certificado_medico_sep.pdf
- https://cdn.shopify.com/s/files/1/0432/8646/2628/files/monument_valley_2_ios_apk.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_off00006913.bin` `415b38e7531f9df7c030f282ca5dc6a46782ce05ef02ae475b5c87a8af41262c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6913	5296 bytes
`font_01_sfnt_off00007b04.bin` `fb0b28bc49687e662d6ada72408acee4c49b320b1094da79f80c60f26416c051`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B04	10416 bytes

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