PDF malware analysis — malicious · 5a9cdfafde93ee70

MALICIOUS

PDF

42.8 KB Created: 2020-09-05 09:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0981e42e587f64f5d867fb04b59b86c2 SHA-1: 4e149cd68897a21c8db510e303231f3de3d61c98 SHA-256: 5a9cdfafde93ee70656c1e3f866b512a4363a1dabac898437d0e6910b1af4dc3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to Android development, likely as a lure. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious content, potentially for phishing or malware distribution.

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.club/wix?keyword=asset+folder+path+in+android+studio
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/007d40_32faf2478fcb420e8de7f7c9ba3b5a09.pdf
- https://static.usrfiles.com/ugd/906e9f_246143bd3a6a4a88849f72ac0c858cb6.pdf
- https://static.usrfiles.com/ugd/5ecadc_ba7786b07e7a44799be8ef0d606b99bd.pdf
- https://static.usrfiles.com/ugd/f8de3e_e739e73b82fc4393866f217acddad1cf.pdf
- https://static.usrfiles.com/ugd/0049ca_b544e8ec98d745bea45361e1fb846c75.pdf
- https://static.usrfiles.com/ugd/7a7fb1_8759c20c610540c9952401c61b0be553.pdf
- https://static.usrfiles.com/ugd/a4d998_98593051cf6b4d2f92515b8f543d5ad7.pdf
- https://static.usrfiles.com/ugd/0ebc1f_b43deb92bf8c42ccb35d16bd3d64987f.pdf
- https://static.usrfiles.com/ugd/c836c3_634c123659774c879caba940f69140a8.pdf
- https://cdn.shopify.com/s/files/1/0432/1922/2687/files/64893668791.pdf
- https://cdn.shopify.com/s/files/1/0431/8032/7070/files/nopan.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_off00006abb.bin` `47fae9f70505b4e3b4279a873a7d1de814799ede74519aa096ee4cb9f50fc8bd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ABB	5120 bytes
`font_01_sfnt_off00007c1c.bin` `801773772fcfea3dd1a578c9e7a6e0908b1ff7a172d61439e5056092711ebb7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C1C	10132 bytes

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