PDF malware analysis — malicious · fa8df3af73ef0de8

MALICIOUS

PDF

52.3 KB Created: 2020-09-05 17:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 31b5ae1dfe3cd431e065bf3372dde7c4 SHA-1: 4117b1c33cd23aaa81fc05ee4db57ef2c900a195 SHA-256: fa8df3af73ef0de85ece42637e2d813387cb618e35148f9c09b57dd5348ceea1

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including one to a known malicious redirector at 'https://ttraff.club/wix?keyword=jsc+2019+science+mcq+answer'. The document body, though heavily obfuscated, appears to contain academic-related keywords and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=jsc+2019+science+mcq+answer
- https://static.usrfiles.com/ugd/0251f0_0db2d55064e64787b28206eb4174229d.pdf
- https://static.usrfiles.com/ugd/b4a829_631cfe0489474f79a97184b1930c0547.pdf
- https://static.usrfiles.com/ugd/b85eb0_83fa2ef4d85343c39058ee728d325f90.pdf
- https://cdn.shopify.com/s/files/1/0433/4229/9295/files/libuvatogimuduboriw.pdf
- https://cdn.shopify.com/s/files/1/0440/2269/4046/files/81935936529.pdf
- https://cdn.shopify.com/s/files/1/0434/0226/4741/files/domid.pdf
- https://cdn.shopify.com/s/files/1/0427/8085/2383/files/how_do_i_stream_on_discord.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
- https://cdn.shopify.com/s/files/1/0429/9853/0201/files/kuzinuwun.pdf
- https://static.usrfiles.com/ugd/3bf302_cafc5341c8bc4c178a657807cd115456.pdf
- https://static.usrfiles.com/ugd/8de238_baf26389aa8b4f27801e9f2d0dc7d2d2.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_off0000697d.bin` `5132fb31313aeaafaff63b1a3402b816ff40909b539d20bb1f1d73fdba66dd63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x697D	5600 bytes
`font_01_sfnt_off00007c8f.bin` `d7bb9b7293dc5e8d06a406ba35d7bb2d6c35793dd2364d6cdaa87c5398399ca5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C8F	11316 bytes
`font_02_sfnt_off0000a109.bin` `c0cc352c20bc88ccd8df85824e954dbf0541b242a1d49c390fb694e32181d14b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA109	10424 bytes

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