PDF malware analysis — malicious · 0c5483b6866f4c8e

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 22:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 31b97353043321e7475c35a7e420085d SHA-1: 5f9d3050079a6d7963c33a9e5570fccd9b0ddd39 SHA-256: 0c5483b6866f4c8eabff0066bc52fab066cb4cb8400aea6e8c38e6f471977c89

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though obfuscated, contains text suggesting it is a lure for search engine traffic, further supported by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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/pify?keyword=analytical+balance+mettler+toledo+pdf
- http://bolij.rosariumsouthafrica.com/uploads/1/3/2/6/132695887/xupop.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/1229/1751/files/brushed_cotton_fitted_sheets_super_king_size.pdf
- https://cdn.shopify.com/s/files/1/0436/0713/0270/files/length_of_string_in_c.pdf
- https://cdn.shopify.com/s/files/1/0436/0273/9362/files/metipovowa.pdf
- https://cdn.shopify.com/s/files/1/0436/2538/2051/files/sopuvuxegow.pdf
- https://cdn.shopify.com/s/files/1/0436/5120/3225/files/bourbaki_integration.pdf
- https://cdn.shopify.com/s/files/1/0429/1559/4393/files/42197199352.pdf
- https://cdn.shopify.com/s/files/1/0437/6769/3474/files/alexander_mcqueen_book.pdf
- https://cdn.shopify.com/s/files/1/0429/8794/6133/files/xikuluzepime.pdf
- https://cdn.shopify.com/s/files/1/0432/5782/3390/files/bvi_company_formations_limited.pdf
- https://cdn.shopify.com/s/files/1/0448/3593/0273/files/nawubixalajoxodaxigezatu.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_off000063bb.bin` `e94f34006ff921d9af75fb236140d5f71ffda74f1c62619f89e89bf744ad7253`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63BB	5356 bytes
`font_01_sfnt_off000075d2.bin` `beefb8893322882234a003574119fc23232f39dc28f4b4a30776ed35ea725dfe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75D2	11604 bytes

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