PDF malware analysis — malicious · 020fb65e9bb77f4a

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 07:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9757c308d8cdad145efe93bc06d70300 SHA-1: 05c04bdf5ad8415d4ec7727c2199bdd17c269055 SHA-256: 020fb65e9bb77f4a5d221224c92a308eea931ece30ddb72dd8c01da575b9cfcd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a '14 day keto challenge free download' lure, and the primary URL points to a redirector. The ML classifier also strongly indicated maliciousness.

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=14+day+keto+challenge+free+download
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_a8e836acaa924b13917c393c764f084a.pdf
- https://static.usrfiles.com/ugd/7d21c0_e431672953be406bb9784d31ecdba671.pdf
- https://static.usrfiles.com/ugd/d94ae5_64d0d53afb50400fb5f4bef1042aa233.pdf
- https://static.usrfiles.com/ugd/95089d_b0d2f53341c447d3b36d619107bebf8e.pdf
- https://static.usrfiles.com/ugd/2f07a1_2daaa71361ab46ec9e89d7080427dc62.pdf
- https://static.usrfiles.com/ugd/bb13a2_b8f46abf9b0b4b3b803c760350c3b366.pdf
- https://static.usrfiles.com/ugd/b8c837_ed2e180409194f98bff96c534e57243b.pdf
- https://static.usrfiles.com/ugd/b8c837_33a20c2671d049069480350bf5f2db69.pdf
- https://static.usrfiles.com/ugd/0dd040_5e8eede203dc4663886b9c7adb8d71ec.pdf
- https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.pdf
- https://static.usrfiles.com/ugd/9c0842_abf961115724471d886f2aa8da83aab7.pdf
- https://static.usrfiles.com/ugd/b8c837_470c600901784a6480168fd239ba6a75.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_off000068b2.bin` `c44ea8ffe77de948aeb2ee545a4af504a6043699160ba1e380307eda5f69a564`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68B2	5408 bytes
`font_01_sfnt_off00007b31.bin` `9cc096db7165b23e1dbf11a21833309a4fc2c4797782cbb4cc57663e533ac2a4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B31	10532 bytes

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