PDF malware analysis — malicious · 436abd24a82c1f56

MALICIOUS

PDF

46.6 KB Created: 2020-09-02 16:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 170c1aba28c9413b35c4a816d330fe38 SHA-1: 031f507c9f35b738a8e8fd05fc934fef1e996544 SHA-256: 436abd24a82c1f568b6abf064e0858564d77762add81dc5ce8ad99dff3aa5234

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, 'https://ttraff.me/pify?keyword=vanilla+sponge+sheet+cake+recipe', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=vanilla+sponge+sheet+cake+recipe
- https://static.usrfiles.com/ugd/b8c837_2d111c0e31f545549e6df551deddc367.pdf
- https://static.usrfiles.com/ugd/097bd5_8d93e5c9f6454ec28addc84fad9a6749.pdf
- https://static.usrfiles.com/ugd/9a242c_2dc6432c0b8d400ab63951e8e68b63cf.pdf
- https://cdn.shopify.com/s/files/1/0431/6083/0108/files/vedogafofegegigimis.pdf
- https://cdn.shopify.com/s/files/1/0437/6595/6759/files/nenabov.pdf
- https://static.usrfiles.com/ugd/173616_d676d07bedf14560880bef6bb7cd33e9.pdf
- https://static.usrfiles.com/ugd/b8c837_99c046e40dcc4af7983cd09e6ce7d7d5.pdf
- https://cdn.shopify.com/s/files/1/0427/9340/2534/files/forepokebaduzoduzozidude.pdf
- https://cdn.shopify.com/s/files/1/0433/7578/8184/files/acramatic_2100_manual.pdf
- https://cdn.shopify.com/s/files/1/0435/1868/9434/files/33033616219.pdf
- https://cdn.shopify.com/s/files/1/0462/7736/1824/files/81981450691.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f54.bin` `f44bbc96fcc9d9d13b3157e5731beca6c1fde6fb55ded1195ebc0254dd692582`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F54	5224 bytes
`font_01_sfnt_off00008110.bin` `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8110	1800 bytes
`font_02_sfnt_off0000899d.bin` `5efafd021671eefd7c10763065b4430debfec3e9cc2e023cda72b1009dcdb417`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x899D	10424 bytes

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