PDF malware analysis — malicious · 694d365c3dc5383e

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 06:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3264041778cbb050bedfdf048f8c28e5 SHA-1: aefa7d3e687a03d1325a65757d1fc689c31aafb1 SHA-256: 694d365c3dc5383e6f8dcc390258111ab24f4680213f890cde8eab629ff4df1b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL and a list of other PDF links, suggesting a link farm or redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for malicious redirection.

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.cc/wix?keyword=active+and+passive+sensors+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/7443/7791/files/fezafilimodeda.pdf
- https://cdn.shopify.com/s/files/1/0431/7914/7430/files/photoshop_caricature_tutorial.pdf
- https://cdn.shopify.com/s/files/1/0429/5704/5913/files/42477389479.pdf
- https://static.usrfiles.com/ugd/c3f88d_b9e32f91849648f1be62664177b9110b.pdf
- https://static.usrfiles.com/ugd/b8c837_bd3d900482cb45d59024eacf05b8b21b.pdf
- https://static.usrfiles.com/ugd/7a11b0_3a96b45a39de4d1399b6cb14d975c412.pdf
- https://static.usrfiles.com/ugd/fbccce_8b71dc5d6fc7472a985e0e108b9bac41.pdf
- https://static.usrfiles.com/ugd/b8c837_34c3d8857fb047e7a1b7ed9bca08d85a.pdf
- https://static.usrfiles.com/ugd/f103bb_8cd2a5500f7d47d89f22c6d0c5b24c19.pdf
- https://static.usrfiles.com/ugd/fe83c3_e414108e196f442d876993b7397c5733.pdf
- https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
- https://static.usrfiles.com/ugd/b8c837_9e46784d0e14422c82fdf6e6567ef99a.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_off00005ddc.bin` `6c460b2ba87c2d8770907dbdb9d071e10282bef5643af6346c757c4e92c9de0f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DDC	5168 bytes
`font_01_sfnt_off00006f7c.bin` `e09c6214477074014af9b1d751f2fa12c7dbccde39675cfb2d48f8ce115c6f6d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F7C	10528 bytes

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