PDF malware analysis — malicious · ba7956d267241d3c

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 02:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1143c7e4e844e61acdeba8bd6eadd2bf SHA-1: fbab61ed767708e3a7008998dcb625486a1f036c SHA-256: ba7956d267241d3c82efd88d72879e5b05548ab196ace2f9cacf4e584a111933

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=conservation+of+natural+resources+project+report+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=conservation+of+natural+resources+project+report+pdf
- https://cdn.shopify.com/s/files/1/0432/6640/8603/files/rasojejifakis.pdf
- https://cdn.shopify.com/s/files/1/0431/6289/4498/files/raduxuw.pdf
- https://cdn.shopify.com/s/files/1/0431/6643/3435/files/26252513573.pdf
- https://cdn.shopify.com/s/files/1/0431/7754/1791/files/74929658832.pdf
- https://cdn.shopify.com/s/files/1/0428/6545/9366/files/96576004933.pdf
- https://static.usrfiles.com/ugd/b8c837_4f4d10fadc8d46719750554383c70777.pdf
- https://static.usrfiles.com/ugd/cc14e4_162442a7fc3343f1aba6d1ac3dd73faa.pdf
- https://static.usrfiles.com/ugd/b4609a_b3c9f3fbfcd046ce89bc2205f6509278.pdf
- https://static.usrfiles.com/ugd/90c678_02bb01ee8fe0445184d63ad4bd12c0d7.pdf
- https://cdn.shopify.com/s/files/1/0429/9866/1279/files/ejercicios_resueltos_de_arquitectura_de_computadoras.pdf
- https://cdn.shopify.com/s/files/1/0438/5246/4293/files/bemuxuzobiwepuwuwiz.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_off00006fbd.bin` `6696425afd62917161cb14b62dc2d278d4e4b3ed09a61f7b2edb61b4f5263f50`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FBD	5188 bytes
`font_01_sfnt_off0000817d.bin` `925313f435b721ae4772830ef829d10586cb406f4a79ebec66b8a5a832e9d7ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x817D	10656 bytes

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