PDF malware analysis — malicious · d957b5ece545e8db

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 02:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0ab42d1df7c492c59beea95761311c5e SHA-1: c54fe3e87470200b1ef20c4b4641540c28ebea29 SHA-256: d957b5ece545e8db95fc0a22cc3091752dd0ebb6deb63d8b2af9e6049982b3f8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body itself contains numerous links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt to mask the malicious redirector. No scripts were extracted, but the presence of the malicious redirector and the ML classifier's high confidence indicate a malicious intent to lure the user to a harmful destination.

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.ru/wix?keyword=bs+en+22553+pdf
- https://cdn.shopify.com/s/files/1/0437/5491/3950/files/accounting_ledger_templates.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
- https://cdn.shopify.com/s/files/1/0431/8104/7965/files/midupepogo.pdf
- https://cdn.shopify.com/s/files/1/0433/6179/6248/files/88838305025.pdf
- https://cdn.shopify.com/s/files/1/0435/1829/6232/files/kifolofajaxej.pdf
- https://cdn.shopify.com/s/files/1/0438/8644/4699/files/tasud.pdf
- https://cdn.shopify.com/s/files/1/0437/3548/2517/files/99677398807.pdf
- https://static.usrfiles.com/ugd/b8c837_8b1a1b3a70334f8bac8ed6da4f39914f.pdf
- https://static.usrfiles.com/ugd/b8c837_e7472894cf8c4921895d0f1fdb15bfad.pdf
- https://static.usrfiles.com/ugd/b8c837_4f1e277bebc34e7587760691e32036de.pdf
- https://static.usrfiles.com/ugd/b8c837_5649eb9cde3848058c2ce7b979c8e0d9.pdf
- https://static.usrfiles.com/ugd/b8c837_2fd837732916455a863ad6b20dd30770.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_off00005f4e.bin` `530b78f1dd02f0c4ca2026af784716e4c5602caa81670be22a306df71bb04b55`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F4E	5164 bytes
`font_01_sfnt_off000070fe.bin` `596f1e34e92ad88ca42c3c0be327292abf37dff26ba2bbd3a60f7de9c0ecad44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70FE	9944 bytes

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