PDF malware analysis — malicious · ca3c7f6512220329

MALICIOUS

PDF

32.3 KB Created: 2020-08-31 03:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: db4940836b8a041eebd7711d10d4713f SHA-1: 46166e44e895965d625574acb30bf1faa9c1ade7 SHA-256: ca3c7f6512220329b51af8124deca7a4089ceff0a0bcc4a0bc998725c819fef4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.com/wix?keyword=used+leupold+rifle+scopes', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify and static.usrfiles.com domains, suggesting a link farm intended to distribute malicious content or conduct phishing.

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=used+leupold+rifle+scopes
- https://cdn.shopify.com/s/files/1/0439/8484/7006/files/naruwadopalunapuxe.pdf
- https://cdn.shopify.com/s/files/1/0441/2683/0744/files/iqra_hanacaraka.pdf
- https://cdn.shopify.com/s/files/1/0434/9794/7300/files/typing_cat_test.pdf
- https://cdn.shopify.com/s/files/1/0432/2207/3506/files/dasutumowegififaxefaxunab.pdf
- https://cdn.shopify.com/s/files/1/0459/8684/0743/files/vulosogivakuja.pdf
- https://static.usrfiles.com/ugd/82e28d_e34635ddcb6a47d3a44272df7b3d0fd9.pdf
- https://static.usrfiles.com/ugd/b8c837_e9b01d07d95c4b9e85287a58ed98cc9e.pdf
- https://static.usrfiles.com/ugd/a31856_6ad5ef7a7d2046d48d2976b411462e4f.pdf
- https://static.usrfiles.com/ugd/15cd4d_12f3def131ea412780e862a6c17fa878.pdf
- https://static.usrfiles.com/ugd/a58b01_f8eab6e0bbe74ceda321c49808662051.pdf
- https://static.usrfiles.com/ugd/b8c837_da8a6199aa8c4473a2a642835b5aa1c2.pdf
- https://static.usrfiles.com/ugd/79e0dc_bbc445884a27403196d64f81db4e329c.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_off000042a3.bin` `64d6871c508d9790a4d67da1cdc3f5dfe6bff8b3240cdec67d8b1a535c148db6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x42A3	4928 bytes
`font_01_sfnt_off00005377.bin` `4fcb754792ab5ef6903ef657542a14099a53e3c62f0f1d34613a826cc4d794cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5377	9812 bytes

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