PDF malware analysis — malicious · 05f66f1ed586afeb

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 20:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c81ac072abc232c80838363d7ed9ace2 SHA-1: dd8c03a0504f9f6aa20da8ff48a6cfaa42deb260 SHA-256: 05f66f1ed586afebaa847934cdff97815140a59778aea5dd18a883386d5e6e83

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link to a known malicious redirector, disguised with a lure related to 'minecraft cracked stone brick'. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the embedded URLs confirm the intent to redirect users to potentially harmful sites.

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=minecraft+cracked+stone+brick
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_4319f67e1db144a1a62b5839a94f623e.pdf
- https://static.usrfiles.com/ugd/b8c837_3d242bff7d5f40cfa0bd56abaee3b691.pdf
- https://static.usrfiles.com/ugd/1fbf8b_bc3ffcfb153f48e6958c51067f89cbda.pdf
- https://static.usrfiles.com/ugd/77941b_168ede71880f41bb86cde2d22e53a559.pdf
- https://static.usrfiles.com/ugd/dfb5f8_6670004187a74a8899807e7570bf6dae.pdf
- https://static.usrfiles.com/ugd/dd4472_94e7b2860d94440c9b6bd3148b9b59be.pdf
- https://static.usrfiles.com/ugd/cafc24_509ba4f56e8b4dd89cbc77a8baa5ccee.pdf
- https://static.usrfiles.com/ugd/166c09_e80cefc63d1348199e55ec97423c8b28.pdf
- https://static.usrfiles.com/ugd/b8c837_39b38634a70b48c19a1df0cd97bb2e68.pdf
- https://static.usrfiles.com/ugd/c83fdb_334e75d494de4888aec5f5fadaa6ca22.pdf
- https://static.usrfiles.com/ugd/565485_01fc219348f04f839d9895ba3fe16613.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_off00005e86.bin` `b194bfedec43c75498f2f5904c70c977074575659a99969515057aad9585dd38`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E86	5192 bytes
`font_01_sfnt_off0000703c.bin` `a72deb92777790a61bb8f40b1ed603dd26e1ca5fb9fb1558e64be34fce076f43`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x703C	14032 bytes

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