PDF malware analysis — malicious · 6488d34aa2b38f1d

MALICIOUS

PDF

33.9 KB Created: 2020-09-06 03:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9058bdb23f175301eb5ced827c0826a6 SHA-1: 78f756afa9d12664f74bee3d56898fa5fdc59cec SHA-256: 6488d34aa2b38f1dec7b52b4af6533586794c8ea8c09519317c0f2d890111664

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.me/wix?keyword=interstellar+theme+piano+sheet+pdf'. The document body, though heavily obfuscated, also contains this URL and a list of other PDF links, suggesting a link farm or redirection attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=interstellar+theme+piano+sheet+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/269bb8_1de0fb0b220f4ad293e7fb19c7e3b96a.pdf
- https://static.usrfiles.com/ugd/dad7b5_abbc5c555c1e4c46bbbd6fd9c10b109b.pdf
- https://static.usrfiles.com/ugd/99afdc_dd85faed3fa4424bbbdfb97d63f655b3.pdf
- https://cdn.shopify.com/s/files/1/0428/1607/7991/files/98644658868.pdf
- https://cdn.shopify.com/s/files/1/0461/0254/4548/files/fukuoka_japan_travel_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/9432/6939/files/vukaguvogapozopidogetiler.pdf
- https://static.usrfiles.com/ugd/0f9ef0_9e619751dcd7459ea40addd7f5a7c55e.pdf
- https://static.usrfiles.com/ugd/76156b_e4577a2770b64707ab8e52008aff9a87.pdf
- https://cdn.shopify.com/s/files/1/0434/4827/1000/files/38440167994.pdf
- https://cdn.shopify.com/s/files/1/0430/7173/3917/files/61915210129.pdf
- https://cdn.shopify.com/s/files/1/0431/2668/5850/files/kiduzujideroruverolugi.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004773.bin` `821d29046b47340d3611a48aa57723d0211b9695d41127299b725a2d41c0ef3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4773	5216 bytes
`font_01_sfnt_off00005902.bin` `c07da6873ceccd8abb2d6628999191d60319f410fd97384f66648838a4e6414b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5902	9976 bytes

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