PDF malware analysis — malicious · 694fe5b627d0de71

MALICIOUS

PDF

40.2 KB Created: 2020-08-23 08:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 792c5c8e01c8e9964b0b22c333ce533c SHA-1: 7ddcab79b4ad7d7e4527c4ef34c3ddb46e2caf86 SHA-256: 694fe5b627d0de7146976a068072f3f21b6df720cd79b2103750d4a4994ad54e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious due to its extensive use of external links, including a known malicious redirector. The document body contains a URL that appears to be a lure for search engine optimization or a link farm, pointing to numerous other PDF files. This behavior suggests an attempt to manipulate search results or distribute further 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.ru/pify?keyword=sustainability+report+british+american+tobacco
- http://files.cinemakomunisto.com/uploads/1/3/0/7/130738512/xasujovugega_sibelawokiwig.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
- https://cdn.shopify.com/s/files/1/0432/8954/2809/files/xevilekebixiz.pdf
- https://cdn.shopify.com/s/files/1/0429/2512/9894/files/pukumipuzimobojigokezi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
- https://cdn.shopify.com/s/files/1/0432/8230/1094/files/muwexosafuketagu.pdf
- https://cdn.shopify.com/s/files/1/0429/5501/4298/files/tusawuvek.pdf
- https://cdn.shopify.com/s/files/1/0432/8531/5737/files/91895985900.pdf
- https://cdn.shopify.com/s/files/1/0429/6127/2983/files/adenovirus_replicacion.pdf
- https://cdn.shopify.com/s/files/1/0430/7278/2489/files/mesibezidi.pdf
- https://cdn.shopify.com/s/files/1/0432/1699/4466/files/29842996953.pdf
- https://cdn.shopify.com/s/files/1/0441/3263/0680/files/likuvowazexopomajodegim.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_off00005f8c.bin` `cc3c527f11098bd51dd7f036632b6b33902c31a209c8235481e8dc12ea4eba3d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F8C	5520 bytes
`font_01_sfnt_off00007215.bin` `5cea4087b3118afefd057e13f397b30732461df19138e9b1cf36029897ad7578`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7215	9976 bytes

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