PDF malware analysis — malicious · 0f1f73787345fa4c

MALICIOUS

PDF

41.4 KB Created: 2020-09-02 20:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5151aad69e58aa409b411790e6b6ada1 SHA-1: 12479323d288aed4bebb8aa789a84010279daa37 SHA-256: 0f1f73787345fa4c602907ca2ba88fa1d43074f9089ad379232f8234efdad8ea

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=bridal+shower+guest+list+sheet, suggesting a social engineering lure. The presence of numerous other PDF links further indicates a link farm strategy, likely to obscure the ultimate destination or to improve SEO for 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=bridal+shower+guest+list+sheet
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_96b525a2971e46f187e573606558a986.pdf
- https://static.usrfiles.com/ugd/5cf23b_82e32d5310814c63a95da6fd5e1f1b5a.pdf
- https://static.usrfiles.com/ugd/87a178_f549ad4692f24edb847f7296f51a4d88.pdf
- https://static.usrfiles.com/ugd/b8c837_afbed24747424c868d89aeb25c9ee842.pdf
- https://static.usrfiles.com/ugd/b8c837_01dff94f677c43b0b26f763c251e3641.pdf
- https://static.usrfiles.com/ugd/ad2ade_a98401dcbba74ba7aa3eb9c2de4521d4.pdf
- https://static.usrfiles.com/ugd/e0d0cf_fd39c2cb6680402dbb6b222be97efec3.pdf
- https://static.usrfiles.com/ugd/b8c837_0d7f62b6f81141dda8cfe8bf027d8c86.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
- https://cdn.shopify.com/s/files/1/0434/1425/7820/files/puzupo.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_off00006483.bin` `8e7bf54e8a356fd3cd8a6834467b8de71399d9ad26f340368ea76b95fe6f4b8e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6483	5228 bytes
`font_01_sfnt_off00007655.bin` `56b5871bb7d4f3c04a212f1a5b3bac8839193f1973afcacae6d8441302a4190b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7655	10152 bytes

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