PDF malware analysis — malicious · 3579ab1c1b6e57fe

MALICIOUS

PDF

35.6 KB Created: 2020-09-03 08:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1466a3a2ac9e5c65a4b92138c27177bb SHA-1: 416cd4cea4e72d6705ac483e9bd836be35a172d9 SHA-256: 3579ab1c1b6e57fe3e807837484fbe1c4999590c289544d36c8bc7af132c2d12

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=cashflow+board+game+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure for a 'cashflow board game pdf'. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful content.

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=cashflow+board+game+pdf
- https://static.usrfiles.com/ugd/b8c837_60818dd9cbe14df4bd4bec0b9b691139.pdf
- https://static.usrfiles.com/ugd/b8c837_54d4cf8d3a224de9b0cee851fed2f3e0.pdf
- https://static.usrfiles.com/ugd/6c032c_0d6572f18e2640c2b3e278c5659c57a5.pdf
- https://cdn.shopify.com/s/files/1/0429/6091/2537/files/xopiranejixobekosu.pdf
- https://cdn.shopify.com/s/files/1/0429/2712/8735/files/animation_maker_android_app.pdf
- https://cdn.shopify.com/s/files/1/0429/5180/3033/files/mazorageneterego.pdf
- https://cdn.shopify.com/s/files/1/0431/6502/4412/files/diffusion_process_in_ic_fabrication.pdf
- https://cdn.shopify.com/s/files/1/0467/7461/6217/files/plague_s_end_quick_guide.pdf
- https://cdn.shopify.com/s/files/1/0435/3366/4420/files/79247269515.pdf
- https://cdn.shopify.com/s/files/1/0447/5292/8919/files/politik_global_amerika_serikat.pdf
- https://cdn.shopify.com/s/files/1/0430/8919/9268/files/mupugozonupake.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_off00004cc7.bin` `e8e1ad93e7eb5f3a538f356068c16652fc1c21e1e5da49bd5f5ada290abbeff4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CC7	5592 bytes
`font_01_sfnt_off00005fac.bin` `d26625bdf6392c63a5106e4339aa177247ad8ce4ee16a8b1e5e5f7de85b7430d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FAC	10112 bytes

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