PDF malware analysis — malicious · ee560cc5e0531a69

MALICIOUS

PDF

32.3 KB Created: 2020-09-01 01:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2e71e8acc0de387d5e0299ea617d0ba7 SHA-1: 1daa21db738744ef11f9179cea09a975b63dd4c7 SHA-256: ee560cc5e0531a6908c57c29bd775791633c5ab75ee2fd9626f791642a5bc619

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=hill+climb+bike+racing+game++apkpure', points to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious with high confidence. The document body appears to be corrupted or obfuscated, but the presence of the malicious URL and the link farm structure strongly suggest a phishing or malware distribution attempt.

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=hill+climb+bike+racing+game++apkpure
- https://static.usrfiles.com/ugd/50de67_f3eb8e6130284ef7bbe355ed84df00a3.pdf
- https://static.usrfiles.com/ugd/e643da_5fd9ce2d67894fbf814eb2f8d71b24ef.pdf
- https://static.usrfiles.com/ugd/b8c837_6ff7f1d9d89e4e2789087cad1ca41012.pdf
- https://static.usrfiles.com/ugd/b8c837_c1b09fe3458b4864bedc3aacab44d508.pdf
- https://static.usrfiles.com/ugd/6924eb_87631324e4274965a7e4987ffb5734c9.pdf
- https://static.usrfiles.com/ugd/accd1f_59c9dbc6af4345bc8511e1f2cf3b3e80.pdf
- https://cdn.shopify.com/s/files/1/0448/5431/3122/files/49669858415.pdf
- https://cdn.shopify.com/s/files/1/0432/1165/3282/files/71765234027.pdf
- https://static.usrfiles.com/ugd/b50c55_9509c2e7db3b49bea7fa963a5a180237.pdf
- https://static.usrfiles.com/ugd/b8c837_e5a80f47e18540c9970a3db75374a0a2.pdf
- https://static.usrfiles.com/ugd/b8c837_3f9dd56c41ae48b7a1425f5c06e789a3.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_off00004128.bin` `4add56c37ee88e81dfa1fcf368c33e646cdf6972a155e798fcfe9cf38d67a1d6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4128	5240 bytes
`font_01_sfnt_off000052e4.bin` `ea561a8c4638c81ebbdf35b40bf2020cbef5edb0e03d11037e39327e4afb5133`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52E4	9976 bytes

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