PDF malware analysis — malicious · 744d17bf116a394e

MALICIOUS

PDF

52.0 KB Created: 2020-09-02 22:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2be40e96c9d21854149819f73b0aceb3 SHA-1: 4a78e6224681cd267fddc1ba2ff395b81ec21945 SHA-256: 744d17bf116a394e1cfce889321553670a069a80277c361c77fd2b1175adf21b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'customer service sample resume templates' and the malicious URL. This suggests a phishing attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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.link/wix?keyword=customer+service+sample+resume+templates
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/67e251_41c3e1c22d224e8e80caf3cb6ab0aca2.pdf
- https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
- https://static.usrfiles.com/ugd/e5412a_09c7df10d12e4437a3f6389a42002347.pdf
- https://static.usrfiles.com/ugd/5b5da7_3f46f1189e3c44cf81cf420c27abec38.pdf
- https://static.usrfiles.com/ugd/a2d007_f4a529b6ede74272bec2de435b6b62ca.pdf
- https://cdn.shopify.com/s/files/1/0432/5743/0176/files/aruba_ap_555_datasheet.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdf
- https://cdn.shopify.com/s/files/1/0457/5032/1308/files/business_letter_layout_template_uk.pdf
- https://cdn.shopify.com/s/files/1/0428/5497/3606/files/zaburonokoro.pdf
- https://cdn.shopify.com/s/files/1/0431/1711/7589/files/swedish_language.pdf
- https://cdn.shopify.com/s/files/1/0428/7817/3343/files/wejejalotasibilowugemina.pdf
- https://cdn.shopify.com/s/files/1/0430/6341/0845/files/dogolojonexukuzobavep.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_off00008da2.bin` `63aa25b12aaafded743313f2014c96a8c7791b3aa20ba5fa165d1111a9470f4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DA2	5044 bytes
`font_01_sfnt_off00009eb0.bin` `987c783dfc0e41d3fa8deb52e879b6df6c14a6fbb195644428d57114db62aa8d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EB0	10704 bytes

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