PDF malware analysis — malicious · 93064e4ee589829d

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 11:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb0a5158c506ba99275678492bb5e7e8 SHA-1: ecc36286a7bd23251183f322801f1d8086150123 SHA-256: 93064e4ee589829d54cf36e8326b1b1fc19a7dff258b2d2727d6a5e34492d33d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a formal email asking for permission. This URL is likely intended to lead the user to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, including the malicious one, supports a social engineering attack pattern.

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/wix?keyword=formal+email+asking+for+permission
- https://static.usrfiles.com/ugd/0c8cc8_a7207929b29b45ad841e868f1f2e02d6.pdf
- https://static.usrfiles.com/ugd/b8c837_e04cfbe82eb043ddbcb5868b31569016.pdf
- https://static.usrfiles.com/ugd/b8c837_a5b9b46cef9c4c3eb2ff562897f9b8be.pdf
- https://cdn.shopify.com/s/files/1/0434/2333/4565/files/6584792431.pdf
- https://cdn.shopify.com/s/files/1/0430/7389/6602/files/b._ed_form_2018_rajasthan_last_date.pdf
- https://static.usrfiles.com/ugd/b8c837_988bedc97cdb49f8883d70279d691a8f.pdf
- https://static.usrfiles.com/ugd/7198c1_820651ac7e8b468a8bd6ba60a72e6fde.pdf
- https://static.usrfiles.com/ugd/b8c837_a309032ba28d4d289b36c7be125dabd7.pdf
- https://static.usrfiles.com/ugd/b8c837_87e67cb6cc884dda9b20febff742b9d9.pdf
- https://cdn.shopify.com/s/files/1/0434/1864/8732/files/immunization_schedule_table.pdf
- https://cdn.shopify.com/s/files/1/0431/7547/7414/files/american_diabetes_association_guidelines_for_diagnosis_diabetes.pdf
- https://cdn.shopify.com/s/files/1/0434/4827/1000/files/malaria_parasite_download.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000676e.bin` `6b00431bffa7200c5d55dd8034be72847c84a5faa7388d3a4ca6750686c5aa83`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x676E	5240 bytes
`font_01_sfnt_off0000792e.bin` `a7fab41aeb8bf73dc089ef235a13239fb656d272744629d61eff0e81624e74b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x792E	10836 bytes

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