PDF malware analysis — malicious · 6cb454dba9805485

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 01:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 497c5e6a4c4db549bb40b1b9b99acfb8 SHA-1: 9a5c3267f42d99c91995d95797a35e3a24d2bc2e SHA-256: 6cb454dba9805485d072da24e1877be0021c00f61c4175a42a380793f057e0b4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a link farm or redirection attempt to lead users to 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=chuquinha+para+bebe+lillo
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/9ea91e_54946eb82f124e9f965bab02522e5ac0.pdf
- https://static.usrfiles.com/ugd/9ea91e_e8602217de4d4e4ea4169278b33c139e.pdf
- https://static.usrfiles.com/ugd/5bb01c_af59865062df48c7bc0d81d637445a57.pdf
- https://static.usrfiles.com/ugd/b8c837_cade67cea84a41fc9e88258cc3f9f00a.pdf
- https://static.usrfiles.com/ugd/5e81b9_36bcc74c9f914e89a6cee1bac0626a92.pdf
- https://static.usrfiles.com/ugd/b8c837_8479371d19b44e2cbf5b22b5ffaed65b.pdf
- https://static.usrfiles.com/ugd/b85eb0_d14eec137f304490b66fd34fcc86eedf.pdf
- https://static.usrfiles.com/ugd/b8c837_05e8dd3f692e42dd9d7b98aabf6b5b1c.pdf
- https://static.usrfiles.com/ugd/b972d5_15012478925b4427aa2c1925f28a1eab.pdf
- https://cdn.shopify.com/s/files/1/0428/6968/6431/files/massey_ferguson_135_parts.pdf
- https://cdn.shopify.com/s/files/1/0435/1990/1850/files/52222766658.pdf
- https://cdn.shopify.com/s/files/1/0437/3915/2536/files/63129009137.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_off000068ed.bin` `6ab45d3743a3e9e47461aa743a1c3be98c68d46b81d2572f291f47f8c2233fea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68ED	4900 bytes
`font_01_sfnt_off00007982.bin` `06d1cd5e0c8a082d0d920c9fc31de9fab62e9a0439eff4f1999808389f67ef19`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7982	17984 bytes

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