PDF malware analysis — malicious · dcf5bade3be1c025

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 18:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bb56c2fc9f1677df5143ca3826aaed1d SHA-1: 4cc8f3f1ca704218eb7eaf0c2ea1d8b03e1c59bd SHA-256: dcf5bade3be1c025f4d411662f554c521561c37e452a6a40258fda65035d5658

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=arduino+uno+board+explanation+pdf, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a link farm used for SEO poisoning or to distribute malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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.cc/pify?keyword=arduino+uno+board+explanation+pdf
- http://files.mpelite.org/uploads/1/3/0/9/130969477/3501689.pdf
- http://files.drpatelinternalmedicine.com/uploads/1/3/2/3/132303189/fd41224853c.pdf
- http://files.lingpuisze.com/uploads/1/3/1/6/131606165/4296724.pdf
- http://files.connectionsonthebay.com/uploads/1/3/1/8/131871488/c11312c538.pdf
- https://cdn.shopify.com/s/files/1/0431/5293/3019/files/buxupixakovezonura.pdf
- https://cdn.shopify.com/s/files/1/0432/7122/5494/files/pisurewaxipuwonasodipotu.pdf
- https://cdn.shopify.com/s/files/1/0429/2047/6828/files/zifaledebuf.pdf
- https://cdn.shopify.com/s/files/1/0429/9846/4665/files/cuales_son_los_valores_humanos.pdf
- https://cdn.shopify.com/s/files/1/0430/6511/4775/files/23134128760.pdf
- https://cdn.shopify.com/s/files/1/0430/7196/3296/files/matitadikufagez.pdf
- https://cdn.shopify.com/s/files/1/0432/3616/3747/files/birakamipewenabulizo.pdf
- https://cdn.shopify.com/s/files/1/0427/5381/8790/files/traductor_de_portugues_a_espaol_gratis.pdf
- https://cdn.shopify.com/s/files/1/0432/3737/6157/files/kutemisuz.pdf
- https://cdn.shopify.com/s/files/1/0451/8101/0071/files/charades_en_francais.pdf
- https://cdn.shopify.com/s/files/1/0436/1846/7997/files/fotopexipusogogev.pdf
- https://cdn.shopify.com/s/files/1/0432/2571/0756/files/bsc_2nd_year_physics_notes.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_off00007655.bin` `2822d0980953e7e36783fc2b7349662fc5b6f1d1e2d4c7c4b74ea8ea2bc74318`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7655	5056 bytes
`font_01_sfnt_off00008797.bin` `b46650f0d1525b41aeda46c2166dd0d8d32b5b7afb8414a1752d734088877145`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8797	10420 bytes

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