PDF malware analysis — malicious · e4fd88d26c3d8614

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 02:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cd8431d42992584acc179aa33d0a4fd5 SHA-1: c3be56c368b70472ff84cfe51b6880449ade6c13 SHA-256: e4fd88d26c3d8614c6f2efa35105d79f5dedc06f7b1f40b04b113fad8a6c40ef

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a link embedded within the document.

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.com/wix?keyword=comunicacion+visual+segun+autores
- https://static.usrfiles.com/ugd/902d29_1b208552dca8453aaa9ccac163f6d513.pdf
- https://static.usrfiles.com/ugd/b444d4_451c383d9ec94807bc16c258815e489a.pdf
- https://static.usrfiles.com/ugd/83b1b3_19fc2c53cbdd4cd88695ba7b587b5a8b.pdf
- https://static.usrfiles.com/ugd/65b209_666f2ba7c40a4846829275e52c2cfd93.pdf
- https://cdn.shopify.com/s/files/1/0433/7333/0593/files/vopafilu.pdf
- https://cdn.shopify.com/s/files/1/0431/2239/3244/files/kipajamelelu.pdf
- https://cdn.shopify.com/s/files/1/0434/4587/8941/files/33122257565.pdf
- https://static.usrfiles.com/ugd/b8c837_dd683b0eeb184becba5b53404da3e5b5.pdf
- https://static.usrfiles.com/ugd/b8c837_99fad0fd65e749edbd69c1ff0b3a1c86.pdf
- https://static.usrfiles.com/ugd/5b9a87_b89ab1e1193f4d979f491f6cb59e9766.pdf
- https://static.usrfiles.com/ugd/b8c837_dfa500f60d3449a1bfd641fce0364fba.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_off000072cb.bin` `fd3a7ad69ffb24311a77f7e26550691db72d90ba9fd22112591e997495196c12`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72CB	5084 bytes
`font_01_sfnt_off000083fc.bin` `d8691e0da0d8dde126de5f8083569cba5a4220612d6130b9bac046c7e06a9841`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83FC	9992 bytes
`font_02_sfnt_off0000a625.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA625	4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.