PDF malware analysis — malicious · 0feb9bcae20cd93d

MALICIOUS

PDF

46.6 KB Created: 2020-09-05 01:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7ef926ae1790c2fd650e07113431632 SHA-1: 691c184fa2113df0e9b022c06c4650ea0227a5bd SHA-256: 0feb9bcae20cd93df8d02ad493050785d6526905d8664627eb4d42ef7d24843d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. One prominent URL, 'https://ttraff.me/wix?keyword=jamboo+tamil+movie+bittorrent', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.me/wix?keyword=jamboo+tamil+movie+bittorrent
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/f46427_ab25870941a24cb7b5e3f9c1c40fca4f.pdf
- https://static.usrfiles.com/ugd/affb4a_700f4c6f54ec4d02bbe11f56f408365f.pdf
- https://static.usrfiles.com/ugd/baa514_f3f7fbc613ee467687324d0ca5701679.pdf
- https://static.usrfiles.com/ugd/b8c837_c08fcbbed20741a2b12fb4785c554676.pdf
- https://cdn.shopify.com/s/files/1/0429/5763/5735/files/f1_2019_setup_guide_singapore.pdf
- https://static.usrfiles.com/ugd/36d413_43d17616366e4740a4cfad1235781eaf.pdf
- https://static.usrfiles.com/ugd/9421c8_3537016439e1409b893ca1f9172bd471.pdf
- https://static.usrfiles.com/ugd/4b68be_5f256fc0b0c44a6a925e23500b94a765.pdf
- https://static.usrfiles.com/ugd/538d67_a46ac819f991415d89d3203e263cefff.pdf
- https://static.usrfiles.com/ugd/90423f_c29377b7386c48df8fc5e06e5a4f5a18.pdf
- https://static.usrfiles.com/ugd/191a6d_9081bb68082443bd944a7b8cfb120867.pdf
- https://static.usrfiles.com/ugd/b4a829_56efba80905842d2a8347b48e283cb4f.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_off00007932.bin` `07055a829365a1580817961293b821130e5c11f7561ab3910571d0c2516e6e85`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7932	4844 bytes
`font_01_sfnt_off0000899c.bin` `2d12beab968b8e7dd8e740005ba0663ad0893b750f949449b9f3372110fb05ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x899C	10616 bytes

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