PDF malware analysis — malicious · 1490ca2ebfd2257b

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 06:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7635ab5c2622e280e17e4b7124e68a45 SHA-1: 5fd438dda6fcc227026bb2f814c6f2fbd1a49463 SHA-256: 1490ca2ebfd2257bbe7b2665c7832468eaeeabc1360ae6dc909c9bf980d89815

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify URLs hosting other PDFs, suggesting a link farm or SEO spam operation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a search result for a product, likely intended to trick users into clicking through to malicious content. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence indicate 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.link/pify?keyword=klipsch+r10b+soundbar
- http://files.roccitytumblers.com/uploads/1/3/1/8/131856129/fokalojero.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/6163/1384/files/holistic_tarot_free.pdf
- https://cdn.shopify.com/s/files/1/0437/3826/7809/files/crystal_reports_9_tutorial_en_espaol.pdf
- https://cdn.shopify.com/s/files/1/0431/6259/9583/files/dakuwitabivitufuk.pdf
- https://cdn.shopify.com/s/files/1/0439/2468/4968/files/10232648600.pdf
- https://cdn.shopify.com/s/files/1/0429/7896/7703/files/ribomut.pdf
- https://cdn.shopify.com/s/files/1/0433/5386/6408/files/11669993517.pdf
- https://cdn.shopify.com/s/files/1/0432/7899/1520/files/41758269648.pdf
- https://cdn.shopify.com/s/files/1/0437/6264/7191/files/75072115024.pdf
- https://cdn.shopify.com/s/files/1/0429/2270/5055/files/95489166371.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_off000065eb.bin` `12b2f1e2f1b91126a0ce26e8f722f03d6c30cd2b15911ac98b1015f2ce4b90eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65EB	5464 bytes
`font_01_sfnt_off00007867.bin` `2f9129bba1c7fb3f1a9fbf0e6888235823f08780a0499b56b862418ee0b3ca94`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7867	11100 bytes

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