PDF malware analysis — malicious · 10a1e0b7adaffdfc

MALICIOUS

PDF

65.5 KB Created: 2020-09-02 09:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c6e3b96a63a042034d333a442871f63f SHA-1: e8730aa19fbcf2a365660d05d576237f88e62c34 SHA-256: 10a1e0b7adaffdfcfc9f717630b8fbbeaac0378b22e4c96952e16ab5e62b81ed

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=mail.+ru+group+annual+report'. This URL is likely used to redirect the user to a malicious site for phishing or malware delivery. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.link/wix?keyword=mail.+ru+group+annual+report
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/800b88_c5080d24cf6e447589919bfc81786771.pdf
- https://static.usrfiles.com/ugd/409ca8_067ec85f5c53484cb536a68d97b0f2f5.pdf
- https://static.usrfiles.com/ugd/99a8f2_3ff592ef48d4406386023137ba76d08a.pdf
- https://static.usrfiles.com/ugd/7f929b_e7a171ada4bb42e88b44bbfda772d5b8.pdf
- https://static.usrfiles.com/ugd/b28ae2_36524121f8e1482e913566f0aaa83d8a.pdf
- https://static.usrfiles.com/ugd/7008f3_91c8762c831c4af38a1804b2d35e0391.pdf
- https://static.usrfiles.com/ugd/8c0e65_22f4d71bbbbb4425873e0959fdd44a52.pdf
- https://static.usrfiles.com/ugd/cdb50c_936417a43212459fa994a12b62240eb6.pdf
- https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
- https://static.usrfiles.com/ugd/432b07_98a71a17fb954ef094aaea1fea500bf9.pdf
- https://static.usrfiles.com/ugd/b8c837_a25d2ea2402347baa32c25210f26d2f1.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_off0000ba32.bin` `726099a39653e733b6e8a81b64ba45fc876bb369da50072c5865e5cdd7ab7ce5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA32	4848 bytes
`font_01_sfnt_off0000cacd.bin` `16c99e04d31ecf8ed731bdefd53141916193b7705ca3f3bde766909c74e86fd1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCACD	14936 bytes

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