PDF malware analysis — malicious · 67dcd2398a330c16

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 11:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9d4baaf044cbf9024dd63eb577f46bb0 SHA-1: c118876f5d11708db4ee1b33064a27143cd3cb6b SHA-256: 67dcd2398a330c1607357cb7bddd275aaf2a8c7ddbd2575e46f337d6038a0cc0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link that redirects to a malicious domain, disguised as a car manual. This is a common social engineering tactic to trick users into visiting a compromised site. The ML classifier strongly indicates maliciousness, and the presence of a redirector link further supports this assessment.

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.ru/wix?keyword=2009+chevy+malibu+ltz+manual
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e3ff21_27d670e945044850907ba81153958d22.pdf
- https://static.usrfiles.com/ugd/724fb5_40a7e89ab3df4e478787cc9b58335865.pdf
- https://static.usrfiles.com/ugd/12745a_52505694427f4a008f95bb00a0575f76.pdf
- https://static.usrfiles.com/ugd/f84671_38b1ca0d84f045c985c138423dae6df6.pdf
- https://cdn.shopify.com/s/files/1/0431/4290/6007/files/42438090040.pdf
- https://cdn.shopify.com/s/files/1/0429/2490/0515/files/suwusokiloridonuvomemit.pdf
- https://cdn.shopify.com/s/files/1/0440/8747/6389/files/80618747751.pdf
- https://cdn.shopify.com/s/files/1/0430/8094/1721/files/tisune.pdf
- https://cdn.shopify.com/s/files/1/0436/1197/9939/files/51172830221.pdf
- https://cdn.shopify.com/s/files/1/0434/3313/2184/files/kinozamesixuvelabevulip.pdf
- https://cdn.shopify.com/s/files/1/0431/5719/2853/files/13760835813.pdf
- https://cdn.shopify.com/s/files/1/0429/1949/3785/files/35890613070.pdf
- https://cdn.shopify.com/s/files/1/0435/4909/8148/files/48650133878.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_off00008117.bin` `3ffed3348b2a4f306690616089c83577ff98492c681a6e9daf0a6d3042fdb416`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8117	5452 bytes
`font_01_sfnt_off00009390.bin` `649e5daddd09c4d0acc4ad97caa7ad661385e3878f02c19737a7e43ecd4910de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9390	13616 bytes

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