PDF malware analysis — malicious · c23982012420c881

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 00:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 10d5be19a328a2275b38cfdf0ef70bf4 SHA-1: 35f354f36b712f9f1dd2c1323d0ca7b6f73d4dbd SHA-256: c23982012420c8818c009f06ff4ec1cf411a177f413a122137fd49e45aaebe78

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains multiple embedded links. One link points to a known malicious redirector, ttraff.com, while others form a link farm hosted on Shopify and other domains. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it may be part of a SEO manipulation or content distribution scheme.

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.com/wix?keyword=de+significado+de+inicio
- https://cdn.shopify.com/s/files/1/0430/5666/0633/files/82797249878.pdf
- https://cdn.shopify.com/s/files/1/0429/6422/2101/files/xamuwowexekekelexonu.pdf
- https://cdn.shopify.com/s/files/1/0429/4115/3439/files/xonarabazix.pdf
- https://cdn.shopify.com/s/files/1/0435/0767/9397/files/62727449448.pdf
- https://cdn.shopify.com/s/files/1/0445/5736/9503/files/statutory_liabilities_in_balance_sheet.pdf
- https://static.usrfiles.com/ugd/0789d5_0dde53f195a54bbb949314cad7b717e8.pdf
- https://static.usrfiles.com/ugd/2b25b5_7085a0ec6f3d41538b3736cc68aa1ee2.pdf
- https://static.usrfiles.com/ugd/b8c837_edaa6cb7a74a450c919441e89df33d72.pdf
- https://static.usrfiles.com/ugd/837d34_e40557aad66e4351b9bd36a2d69140e7.pdf
- https://cdn.shopify.com/s/files/1/0432/3642/5883/files/favafar.pdf
- https://cdn.shopify.com/s/files/1/0434/0246/1351/files/contract_of_employment_template_australia.pdf
- https://cdn.shopify.com/s/files/1/0428/3308/4575/files/gixemonumuzavozavaxof.pdf
- https://cdn.shopify.com/s/files/1/0430/9277/0977/files/91468352011.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_off0000690b.bin` `9c7e8242af4560760fb68b2e73738cff67f5c61461c20697f0cc6998d4e96718`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x690B	5060 bytes
`font_01_sfnt_off00007a57.bin` `fbad4aa6ecae639f42d96fbac399d3e84e9cc3d6f3372793c90b431ad96a5033`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A57	11164 bytes

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