PDF malware analysis — malicious · 091ec128a18501c6

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 03:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e1aed29d046a3bf7d82a0b4ffe6a75fc SHA-1: 42fce970ec01db75999adf8a7213e5eada6dd3a2 SHA-256: 091ec128a18501c645931aeadf6acb36e955100e09bc1fde14bfabc9af16f35f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'elaboracion de gomitas' and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute 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.com/wix?keyword=elaboracion+de+gomitas
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_cc392fe176fb4a268201b862ed063098.pdf
- https://static.usrfiles.com/ugd/b8c837_ca84c32b404848afb21662144e46e05e.pdf
- https://static.usrfiles.com/ugd/b8c837_affdca35539d4e3f84b75cf182a391b1.pdf
- https://static.usrfiles.com/ugd/b8c837_60427313b8fc48bea578d7add9820f02.pdf
- https://static.usrfiles.com/ugd/b8c837_75d2301fdca142c3a28a39fa3cc53ce6.pdf
- https://static.usrfiles.com/ugd/b8c837_381821c13eea4a398b333fa93cc4ae01.pdf
- https://static.usrfiles.com/ugd/b8c837_808f5e4e469544c9a9b318165073737b.pdf
- https://static.usrfiles.com/ugd/b8c837_7bf5729d17f74ebdada24755f1b99802.pdf
- https://static.usrfiles.com/ugd/b8c837_1c88fd91eb284196bf4a88e69f2587c6.pdf
- https://static.usrfiles.com/ugd/b8c837_25b58bb01a5243d7ab4e2c5c332ed164.pdf
- https://static.usrfiles.com/ugd/b8c837_19e027171820425ba6024ce075f59de4.pdf
- https://static.usrfiles.com/ugd/b8c837_963a1f0ead924d0b943671f60847e9cf.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_off00005c5e.bin` `0e99791b2cebc0c5361dc75692345c1120fafd0a97f58b6a2c67f56407f38556`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C5E	5356 bytes
`font_01_sfnt_off00006e7b.bin` `3fcb045ecc42c7d87c4ced42d117cc9a9929c1649a33b1a299dd4a10ea59fbf2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E7B	10444 bytes

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