PDF malware analysis — malicious · 6f5edd155fdaefdf

MALICIOUS

PDF

62.5 KB Created: 2020-08-15 10:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1271b6bbd298686e83b3d47910fe28ee SHA-1: a919bb1509c3f1fe8455f0e95c87fbb56afb83a2 SHA-256: 6f5edd155fdaefdf977dc65323051ab2c25e4155048bc63b8082508e491afdf2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users seeking information, likely to exploit them via the redirector. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=amperometry+principle+pdf
- http://files.blueprintdesignanddevelopment.com/uploads/1/3/1/4/131437394/89c15850abc0c2.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0438/6743/9259/files/neuralgia_de_arnold_fisioterapia.pdf
- https://cdn.shopify.com/s/files/1/0440/9327/6312/files/17012948927.pdf
- https://cdn.shopify.com/s/files/1/0437/0549/9803/files/lenowuzaxisul.pdf
- https://cdn.shopify.com/s/files/1/0437/3816/9498/files/biodiesel_production_synthesis.pdf
- https://cdn.shopify.com/s/files/1/0432/3937/5012/files/10346233868.pdf
- https://cdn.shopify.com/s/files/1/0447/8749/9157/files/dibrugarh_university_bsc_botany_syllabus.pdf
- https://cdn.shopify.com/s/files/1/0429/3555/0118/files/bach_magnificat_quia_respexit_pdf.pdf
- https://cdn.shopify.com/s/files/1/0437/8981/1861/files/wovirovipuvaj.pdf
- https://cdn.shopify.com/s/files/1/0433/1126/7990/files/puvejudif.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_off0000ad8b.bin` `f0f4ac1e76828f6d346fb3587290c33a7380dfc40498d810816cd393599dfebb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD8B	5004 bytes
`font_01_sfnt_off0000be7e.bin` `7f7b00eb64e2d17497ae2f55fa17b74474aa0606680671df674eec913647dc69`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE7E	15412 bytes

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