PDF malware analysis — malicious · 78332bf78441c15f

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 05:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0bb8856e7465afa0f2bf4c3ec20d80d9 SHA-1: a9e5648c30f419c3e851fe29d2409f80ae8decd4 SHA-256: 78332bf78441c15ffcbbfeea44ae6ce91745a0075efdd6dcff6ccb24c4390ddc

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains the string 'Hard disk regenerator 2011 serial nu' and the malicious URL, suggesting a lure for cracked software. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm designed to improve search engine ranking for 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.cc/wix?keyword=hard+disk+regenerator+2011+serial+nu
- https://static.usrfiles.com/ugd/9b33c5_0b0e86d9dce843059fd82e499f8ddfb6.pdf
- https://static.usrfiles.com/ugd/2b25b5_5770584ec4b342e997367e23c70f9e4a.pdf
- https://static.usrfiles.com/ugd/b8c837_d66773c55c68409da9e384c497cd7da9.pdf
- https://static.usrfiles.com/ugd/9ea91e_4e31993598204586af65c444636d37d3.pdf
- https://static.usrfiles.com/ugd/6c032c_bf05ca6716034b7b9e91692042f5a332.pdf
- https://cdn.shopify.com/s/files/1/0433/4796/8149/files/rujitojagixutadufetuto.pdf
- https://static.usrfiles.com/ugd/b8c837_cfc12aed518b47ab9eba0c7f889ab643.pdf
- https://static.usrfiles.com/ugd/b8c837_8ccf7910b4a148a2bd9714247274e312.pdf
- https://static.usrfiles.com/ugd/cec570_babaa4eea7474e84999c21d488ecfaf9.pdf
- https://static.usrfiles.com/ugd/b8c837_de1340f1607743f594209bed08f197e5.pdf
- https://static.usrfiles.com/ugd/b8c837_15f326ea0ada4b75873805b2b7f733ef.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b38.bin` `8c6cd2e30188dae0f1a54807121098b9d7c28dfa7cdf00669fc921730a6b1fe1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B38	5344 bytes
`font_01_sfnt_off00006d7d.bin` `a9d99f75221b581c3d5bfdab517724ee5ca06ffb43dcedafa9303a1c261d3720`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D7D	11008 bytes

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