PDF malware analysis — malicious · 07534c8ea99630a0

MALICIOUS

PDF

34.5 KB Created: 2020-09-01 03:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2d1a7cd33c976143b986f9b20922db35 SHA-1: 3ac9e21c8101f5d7aee88e68dbb6a086ffb78855 SHA-256: 07534c8ea99630a0cc93db5becdd778686aece5faf787a613518ca0d4ac8771d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'car background photos' and the malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=car+background+photos+free
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://static.usrfiles.com/ugd/e1c37d_0441c62ed5494c0ca289e725cc6fcb62.pdf
- https://static.usrfiles.com/ugd/b8c837_74b57338578845ef8460befcdf8554ad.pdf
- https://static.usrfiles.com/ugd/73c254_c22c7a1676914bf98d8f9b4e606b7004.pdf
- https://static.usrfiles.com/ugd/fb83f1_2a21b8c4d68e44b3b0860c54fad3fd60.pdf
- https://static.usrfiles.com/ugd/ca9b0a_1a65422e09084f0ba452341b9153af5c.pdf
- https://cdn.shopify.com/s/files/1/0432/2318/7614/files/10185836456.pdf
- https://cdn.shopify.com/s/files/1/0430/7327/4010/files/alien_3_the_gun.pdf
- https://cdn.shopify.com/s/files/1/0433/4842/6910/files/38410315938.pdf
- https://cdn.shopify.com/s/files/1/0435/3005/9940/files/jenusepan.pdf
- https://cdn.shopify.com/s/files/1/0436/3078/8758/files/46288138889.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000040f3.bin` `cbb99dc0229b6d8bc2977a8e249020a0458008483d1fc94e9d840017e2c01e3d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x40F3	5444 bytes
`font_01_sfnt_off00005369.bin` `0abef3f09fcf9e679718a7ae46379b00ba4c509abc9d5f3be981cf58337bb1d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5369	8224 bytes
`font_02_sfnt_off00006f83.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F83	4324 bytes

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