PDF malware analysis — malicious · f8516736074d09a0

MALICIOUS

PDF

40.1 KB Created: 2020-09-23 22:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dda97f589057451d5fd70a7f7dab0ac3 SHA-1: 599f117b475c6ae1a9ca41e2f93d03e13fbdef96 SHA-256: f8516736074d09a0553d4bb803fdd26c9fbbf897ea58e91f80a63e87b8476d76

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm, with the primary malicious redirector URL being https://ttraff.me/wix?keyword=tinder+apk+mod+10.17.0. This indicates a lure to download potentially malicious content, such as an application, or to visit a phishing page. The ML classifier strongly supports the malicious nature of this PDF.

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=tinder+apk+mod+10.17.0
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jexisobipa.pdf
- https://cdn.shopify.com/s/files/1/0434/2641/4748/files/wisavove.pdf
- https://cdn.shopify.com/s/files/1/0433/2843/8427/files/kibedaxib.pdf
- https://cdn.shopify.com/s/files/1/0430/0737/7561/files/fisojavanotuv.pdf
- https://cdn.shopify.com/s/files/1/0436/5202/2430/files/milaxunefexizanizirumeg.pdf
- https://cdn.shopify.com/s/files/1/0433/7185/6026/files/73830080274.pdf
- https://d6871a13-56e2-427e-8933-09ba482d84af.filesusr.com/ugd/7c30af_34e5ef0d15fc4c3798074bcd90f19e95.pdf?index=true
- https://f6c330c7-b79d-4ef5-9543-37dc19814786.filesusr.com/ugd/217b8a_0cc269e988434e7da8ea7baa2dc3fdcb.pdf?index=true
- https://81abdbb8-0576-466c-932f-892151e3823b.filesusr.com/ugd/ef0078_15c308b44bf54c22ba32ba764a1c4006.pdf?index=true
- https://3dbf8f8b-a412-472a-a9ff-16c80aef0db3.filesusr.com/ugd/6cabbb_e30a235bdd7346ceb3c26f299e38485b.pdf?index=true
- https://1d0d59b7-851a-4cee-bd28-561c893ee0cc.filesusr.com/ugd/65b209_d17b12c32cc1411ea023d672cd396662.pdf?index=true
- 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_off00005e83.bin` `4fcb1ffa2a3c9173e34eec38e2518c4212ce7b3291b3bf06a44edb22f01718b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E83	5216 bytes
`font_01_sfnt_off0000703e.bin` `fe897df2f0b0961e386b649eb6b4046ffe78d6851e85ee14b6e49bb5b89cab24`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x703E	10512 bytes

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