PDF malware analysis — malicious · 69dba36893d27d78

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 15:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 900bc391c261d6c6970da80b55d33291 SHA-1: bba20bc38b41d75a554d9e14d6c63a15f063bc80 SHA-256: 69dba36893d27d78b10c765cfdcc5f14892736a85143d6b84b51b542d2dab2f4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a malicious redirector, likely intended to lead the user to a phishing or malware distribution site. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=assassin%2527s+creed+2+assassin%2527s+tombs
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/1914/9216/files/13000113304.pdf
- https://cdn.shopify.com/s/files/1/0428/5880/7455/files/66779391603.pdf
- https://cdn.shopify.com/s/files/1/0432/9648/9632/files/napubifepudako.pdf
- https://cdn.shopify.com/s/files/1/0430/5515/3303/files/vuzukidinenodexutina.pdf
- https://cdn.shopify.com/s/files/1/0429/2280/3366/files/3433793928.pdf
- https://static.usrfiles.com/ugd/269bb8_46b6398210a94e24b0e0833003c9b5fb.pdf
- https://static.usrfiles.com/ugd/b8c837_b7b30d30360941fc9ee6229c55a5721d.pdf
- https://static.usrfiles.com/ugd/b8c837_a3fad402974c48eda4ff995286b5a2a6.pdf
- https://static.usrfiles.com/ugd/b8c837_f1774ddf6d114eb98cce210ceae72023.pdf
- https://static.usrfiles.com/ugd/b8c837_53e8f6c744ad4c91b07e0a08e93016c5.pdf
- https://static.usrfiles.com/ugd/b8c837_3823b0cfa5174fe4a4bd80fdbc961c84.pdf
- https://static.usrfiles.com/ugd/b8c837_de375d03be5b4531aae2a3e01fc7263c.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_off00007132.bin` `0402facacffdaa6dc1ea4baeff7968452b969999e67e79b34f03f54f6b7a30bd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7132	5348 bytes
`font_01_sfnt_off00008340.bin` `7da8c8c2f18e82c2185074097bf1509776c6b6554720c6f8295d903e21946ac2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8340	10000 bytes

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