PDF malware analysis — malicious · d2293592d65624e2

MALICIOUS

PDF

37.5 KB Created: 2020-08-30 11:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2975f8cd9f673ae662483af506d7fa82 SHA-1: 75577c6b7df0d572c4e50980677b81671a01797f SHA-256: d2293592d65624e2d57eacf920c9d5b36326a27af991f7de0528b74f05059adf

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm, directing users to multiple external PDF files, one of which is a known malicious redirector. The primary malicious URL identified is https://ttraff.cc/wix?keyword=restas+llevando+para+imprimir. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains numerous embedded URLs, supporting the 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.cc/wix?keyword=restas+llevando+para+imprimir
- https://static.usrfiles.com/ugd/b8c837_997ae683a9c349bf93a1d04be82e9c43.pdf
- https://static.usrfiles.com/ugd/b8c837_edb5ca1338b24b1cacb339a2cb2623b4.pdf
- https://static.usrfiles.com/ugd/07625c_cdcf6579314840349264e164614501aa.pdf
- https://static.usrfiles.com/ugd/b8c837_4ec54658663d40dda07b4a9180666798.pdf
- https://static.usrfiles.com/ugd/b8c837_3e30738be028449b907ad1437567bbaf.pdf
- https://cdn.shopify.com/s/files/1/0430/4902/5690/files/602882590.pdf
- https://static.usrfiles.com/ugd/9374a7_fc6f9f7302f14905a12a6e41c61bc279.pdf
- https://static.usrfiles.com/ugd/32777b_8855985412894a9eb679c66fa52e59c9.pdf
- https://cdn.shopify.com/s/files/1/0431/7210/2308/files/25069080809.pdf
- https://cdn.shopify.com/s/files/1/0436/9186/8313/files/51896201323.pdf
- https://cdn.shopify.com/s/files/1/0428/8764/3302/files/korebuledelagavan.pdf
- https://cdn.shopify.com/s/files/1/0440/6706/1910/files/riptide_ukulele_tabs.pdf
- https://cdn.shopify.com/s/files/1/0437/0936/6427/files/dijufutewasusaxuva.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_off000057dc.bin` `5754625d4aafddf68d927ed2c152574e84a38749ab1aad2b7279252ba1fe79f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57DC	5172 bytes
`font_01_sfnt_off00006960.bin` `8523872238f7df92943ed45357954b553b853da30af508243a003c06652d113b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6960	9932 bytes

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