PDF malware analysis — malicious · 0971f8622c20a94b

MALICIOUS

PDF

36.5 KB Created: 2020-09-05 09:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 524d3dffe92ce80c70eab3c23068870b SHA-1: 462799c08ca18c629997a5b6f0a4f04f1ff6be2f SHA-256: 0971f8622c20a94bcf1b2b4cc87ae1a50ee6174596e8bceb44b1786c9a0071ff

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, disguised as educational content. The ML classifier strongly indicates maliciousness. The document body and embedded URLs suggest a lure to a malicious site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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.club/wix?keyword=7th+grade+english+test+with+answers
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/f46427_3290b122cd4548c592154e689c96eb7f.pdf
- https://static.usrfiles.com/ugd/140efa_28cb56842dd84a81b4f99e122cce4744.pdf
- https://static.usrfiles.com/ugd/b8c837_5d758355a40747b78d801443d6e8c92f.pdf
- https://static.usrfiles.com/ugd/7b00a0_68dd271ad1ab4e5ba65de08f6baaa0f3.pdf
- https://static.usrfiles.com/ugd/1b8612_96f04ae78cad414ca95e19b4042574a7.pdf
- https://cdn.shopify.com/s/files/1/0436/9969/9866/files/25249849131.pdf
- https://cdn.shopify.com/s/files/1/0433/9515/4070/files/55654514011.pdf
- https://cdn.shopify.com/s/files/1/0428/6775/3116/files/ace_questionnaire_scoring.pdf
- https://cdn.shopify.com/s/files/1/0434/7658/2552/files/fokekodisavekipibawowoz.pdf
- https://static.usrfiles.com/ugd/8b97dd_6e37e77c96b146948de11100fba0d355.pdf
- https://static.usrfiles.com/ugd/dc8a8e_64b0a629a32b413bb9b8cff7de1a48a9.pdf
- https://static.usrfiles.com/ugd/4e6dd5_cf65608043b54b2195090e12e820a25a.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_off000050ba.bin` `65a1610b58cd9bb3eb176ab83707328f1a933ebcd8f04942ef12f6337f38172f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x50BA	5164 bytes
`font_01_sfnt_off00006257.bin` `225a4790265fde7c4e8a99e452deecd4989b9b15808d583bdb324993897c33c1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6257	10344 bytes

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