PDF malware analysis — malicious · 13227b225d79ea12

MALICIOUS

PDF

38.4 KB Created: 2020-08-19 00:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a10e29f687bf2ff60ce58a483521e451 SHA-1: 19bd3f00b3228c7582cebdbf35981d893bb66ed2 SHA-256: 13227b225d79ea12cd2a0527e298ed0891f94499130a20370373d625153f6b01

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'Cadstd pro free' and the malicious URL, suggesting a lure to download or access potentially harmful content. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious destination.

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.com/pify?keyword=cadstd+pro+free
- http://vufix.achconsulting.com/uploads/1/3/1/8/131858156/375898.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/8250/6647/files/fawit.pdf
- https://cdn.shopify.com/s/files/1/0436/0683/5358/files/sinixegiwipito.pdf
- https://cdn.shopify.com/s/files/1/0448/2826/2560/files/xedepexelajom.pdf
- https://cdn.shopify.com/s/files/1/0437/2650/4086/files/55127981350.pdf
- https://cdn.shopify.com/s/files/1/0433/7192/1571/files/19123030810.pdf
- https://cdn.shopify.com/s/files/1/0435/9146/7176/files/20117744671.pdf
- https://cdn.shopify.com/s/files/1/0432/7188/0870/files/52912027759.pdf
- https://cdn.shopify.com/s/files/1/0431/8255/5300/files/72559548964.pdf
- https://cdn.shopify.com/s/files/1/0429/2280/3366/files/38005261126.pdf
- https://cdn.shopify.com/s/files/1/0430/8133/4933/files/80053986564.pdf
- https://cdn.shopify.com/s/files/1/0432/1411/0880/files/pawazisagojatuxo.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_off000052cf.bin` `365425c1e35a39ee02e85d8c4015392a5171f8b27d519f3179808670235eaf03`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52CF	4908 bytes
`font_01_sfnt_off00006391.bin` `c507a5804f9c3e3b6642c8161d21f8457f0bcb699dba7c1c929ddeb83bf35bb8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6391	11912 bytes

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