PDF malware analysis — malicious · 6605cdf650567a84

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 05:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 882a5d87e5dc981129518dd9a560ebb7 SHA-1: 07423780dc283ad138358fa85f951562bb32f8e5 SHA-256: 6605cdf650567a84159fca33e7eaa4754f2d5d0a2e13139ee6906304393f0f2c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to a medical procedure and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=surjet+intradermique+r%2525C3%2525A9sorbable
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/1c90dc_65b7d13ed25a419f82b960ddd96df5c4.pdf
- https://static.usrfiles.com/ugd/b8c837_b5cfaea357d74801a4863968279feb0a.pdf
- https://static.usrfiles.com/ugd/ea78e0_148f5bc6c8ee45eb8ab75ec6754a841a.pdf
- https://static.usrfiles.com/ugd/8cbfce_753c9d5ca5ff47fb96e9e788428fcc74.pdf
- https://static.usrfiles.com/ugd/dfb5f8_e05e32afb8af44e39aecb14093e563e4.pdf
- https://static.usrfiles.com/ugd/7f46b5_0f6dfaba2dfb4bad9d0ea097047b50ca.pdf
- https://static.usrfiles.com/ugd/a18aa6_0056bccc734f4a28b558d746ea95d17c.pdf
- https://static.usrfiles.com/ugd/b8c837_9d5d4559799d4e79b77e9104af2e55d2.pdf
- https://static.usrfiles.com/ugd/b8c837_6aab9125c07940f88d7cef672e60a019.pdf
- https://static.usrfiles.com/ugd/36f25b_77c0e226b35d41d4a8cc404abb5a00d3.pdf
- https://static.usrfiles.com/ugd/2b25b5_c6fe27893e0b4998a4123d47d1ce56b8.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_off00008284.bin` `8ba938deab23f852aea6911278701882b1144e46a6dec8ef37956b1037461a1a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8284	5560 bytes
`font_01_sfnt_off00009504.bin` `a01f6e7ee5403df0ef266fd7d3b48da3f733697e7e5a77bb838fd8fe480139d6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9504	11648 bytes

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