PDF malware analysis — malicious · be3ea5919275e8bf

MALICIOUS

PDF

66.2 KB Created: 2020-08-19 01:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1d90c1dbc37247cb06fd662662b46718 SHA-1: e7cd919685ab7dfd3b1a50bc551122cf5dc69c1b SHA-256: be3ea5919275e8bffdb864bf3718deb2ea852ec217f379596e7b710f4d92449d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of the URL https://ttraff.cc/pify?keyword=edvantage+science+ap+chemistry+2+answers strongly indicate a malicious intent to lure the user to a harmful site. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the final 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.cc/pify?keyword=edvantage+science+ap+chemistry+2+answers
- http://files.tonibeutler.com/uploads/1/3/1/8/131871854/3651723.pdf
- https://cdn.shopify.com/s/files/1/0428/5507/1900/files/tugemusapitona.pdf
- https://cdn.shopify.com/s/files/1/0431/0119/2352/files/bekewulamavegokam.pdf
- https://cdn.shopify.com/s/files/1/0436/0493/4814/files/8255958976.pdf
- https://cdn.shopify.com/s/files/1/0434/0911/3253/files/apache_hadoop_architecture.pdf
- https://cdn.shopify.com/s/files/1/0428/8885/5718/files/38455016272.pdf
- https://cdn.shopify.com/s/files/1/0434/1386/4604/files/28401703939.pdf
- https://cdn.shopify.com/s/files/1/0432/7974/5192/files/35406776246.pdf
- https://cdn.shopify.com/s/files/1/0428/9508/1625/files/third_point_campbell_soup_presentation.pdf
- https://cdn.shopify.com/s/files/1/0428/3822/9158/files/sufivevuzamul.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b3b5.bin` `8b69ad8bf8706a8de8604f0485c67fb25a23b24d50174afbb8bbf061f3c53837`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3B5	1684 bytes
`font_01_sfnt_off0000bc19.bin` `7ac99de2782afd1f40dc25db6780d63b6b92a71000fc3a3e4ba642866ff65461`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC19	5796 bytes
`font_02_sfnt_off0000cfca.bin` `c7efd472f4445c70e3d59fb44f8e65cdfed602153944366a0ac5a6152a6b69ad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFCA	14064 bytes

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