PDF malware analysis — malicious · c5489e851d35aa2c

MALICIOUS

PDF

31.8 KB Created: 2020-10-31 17:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 16f524389469a5d71ac54573ec0f8fb9 SHA-1: e04383d43570c3c79b8224656b6d3cf9fd6c3e71 SHA-256: c5489e851d35aa2c994a623dbe7f3238cf0b3cebfe0316f9943bfc26c69b4991

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though partially obfuscated, includes the URL and appears to be a lure disguised as a school calendar. The ML classifier also strongly flagged this PDF as malicious.

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.
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/pify?keyword=adams+12+school+calendar+2020-21 In PDF document text
- https://cdn-cms.f-static.net/uploads/4380080/normal_5f8aae2bc079a.pdfIn PDF document text
- https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/zumifovemonozu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387040/normal_5f968070b462b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367268/normal_5f8eb8db4d030.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393356/normal_5f91c54082da5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388825/normal_5f9bb6e6d3f7a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/578ae893-c5f0-4692-b17a-74eab8b184f0/sikujojeledudol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0468/8606/0189/files/tuzalak.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0480/5086/4287/files/haruki_murakami_1q84.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/8588/7167/files/modifier_en_ligne_gratuitement.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003ffa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3FFA	5528 bytes
SHA-256: `6cd99f948d7a6873ec9be4224c4bebbb6d6f9d925139e32eb9a2f3cf0da72d24`
`font_01_sfnt_off000052a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52A4	9412 bytes
SHA-256: `93b37ff743cf9d436d3579dc100d980dc4812cd8b810df105ed4ac66ebc7972e`

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