PDF malware analysis — malicious · 56c7aa0d397efbc7

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 09:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d7596f8233b9a462b29f2e97ddf39205 SHA-1: 353bc8218595a7be0a95df76d77697091c473a10 SHA-256: 56c7aa0d397efbc7f60335e8fa1a834b7b477cb4f97ad4786baa73dad32ae6d2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=direcci%25C3%25B3n+de+marketing'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, also contains the malicious redirector URL and several benign-looking PDF links, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious.

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=direcci%25C3%25B3n+de+marketing
- https://cdn.shopify.com/s/files/1/0432/9465/4632/files/favodaned.pdf
- https://cdn.shopify.com/s/files/1/0434/4270/0455/files/12807166642.pdf
- https://cdn.shopify.com/s/files/1/0436/5680/6565/files/vosomogop.pdf
- https://cdn.shopify.com/s/files/1/0429/4026/8711/files/79882712050.pdf
- https://cdn.shopify.com/s/files/1/0439/6207/3246/files/kulodifesupopibutidaxo.pdf
- https://cdn.shopify.com/s/files/1/0437/2565/2136/files/fujedazarabot.pdf
- https://cdn.shopify.com/s/files/1/0431/0469/8535/files/access_bars_tehnika.pdf
- https://static.usrfiles.com/ugd/b8c837_271e8e2d8cfd4fd8a19ed72378705513.pdf
- https://static.usrfiles.com/ugd/b8c837_a644aabf54cd4891aee24555feb8c015.pdf
- https://static.usrfiles.com/ugd/b8c837_c339c8983be644e3b4c99bf180b96e90.pdf
- https://cdn.shopify.com/s/files/1/0434/6429/4557/files/3270796036.pdf
- https://cdn.shopify.com/s/files/1/0432/8642/9861/files/38704111833.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_off00007166.bin` `e25e8ce794328ce6c97a01e6bf3476df7a7897e692d39cb1f65a7547721c8a88`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7166	5248 bytes
`font_01_sfnt_off000082e5.bin` `35f85bd46d328d47c65a431a6360563eae80a680319d2708051b9ae741c5bfca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82E5	11064 bytes

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