PDF malware analysis — malicious · c33690a2d5e51c52

MALICIOUS

PDF

61.1 KB Created: 2020-08-30 17:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c037ccca7abcc972ca8cfccd2b7804e0 SHA-1: 80b43f447b4b8ef35d8c50a7529ed0795c1c403f SHA-256: c33690a2d5e51c52c62436c13cf343502c86f23d7f7c72dac6d12c77558401ca

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link disguised as a game development guide, which redirects to a known malicious URL. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be social engineering through a deceptive document, leading to a malicious redirector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=the+ultimate+guide+to+game+development+with+unity+2019+pdf
- https://static.usrfiles.com/ugd/b8c837_7e136b3e22ea48c59343d51277a2b9ae.pdf
- https://static.usrfiles.com/ugd/4f270c_5ebb93f450e54ce68829ddd69ba800b8.pdf
- https://static.usrfiles.com/ugd/2ca09c_56f907fa06dd415d8d98ce9dacbc28c0.pdf
- https://static.usrfiles.com/ugd/36f25b_af0615dcf9ec44aebb09fc69a6da2ebe.pdf
- https://cdn.shopify.com/s/files/1/0434/5744/6038/files/34814945003.pdf
- https://cdn.shopify.com/s/files/1/0431/0378/1015/files/ruveworosanufunikobit.pdf
- https://cdn.shopify.com/s/files/1/0432/4248/7972/files/how_to_convert_cdf_file_into_file.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
- https://cdn.shopify.com/s/files/1/0427/9923/5228/files/problem_solving_skills_assessment_questionnaire.pdf
- https://cdn.shopify.com/s/files/1/0430/7727/1706/files/45760467351.pdf
- https://cdn.shopify.com/s/files/1/0437/6189/3534/files/mcq_medical_laboratory_technology.pdf
- https://static.usrfiles.com/ugd/b8c837_bdacf10884604719b5fe5f97e6c3203c.pdf
- https://static.usrfiles.com/ugd/b8c837_e1f893424f6f45a6bf6d60411436a869.pdf
- https://static.usrfiles.com/ugd/384ea4_a4d209618bbc49ebbe3d03c5df9d4d0e.pdf
- https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008ae8.bin` `9c03a50652c2025531eab4dddaf589443e2e323221516dd5def255d0b75833c4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AE8	5748 bytes
`font_01_sfnt_off00009e7a.bin` `b42ac674367d32b9970eed3a707a07e774c3319cbfd56db7f0ca6eda46be1a3c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E7A	10304 bytes
`font_02_sfnt_off0000c1f6.bin` `bc6d684f813ac1c32be8bd0fe15b7813cdddcd900b6f98dcbbe4bb93017ec79b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1F6	16448 bytes
`font_03_sfnt_off0000d84e.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD84E	4324 bytes

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