PDF malware analysis — malicious · 0e837f1401f64d05

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 07:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ac60a042c8b1f8f9fc18d9ffd9e3a0bc SHA-1: 97cbc796ad15f4e8e7c03a539d5fe8d40a08d579 SHA-256: 0e837f1401f64d05dd4c3bbe17413e1af88dbaeef411d52322331b81854232dd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a deceptive title related to weather reports but is primarily a link farm designed to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the primary malicious URL, while PDF_SEO_LINK_FARM indicates the presence of numerous external links, many of which are to benign Shopify domains, likely to obscure the malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=grandfather+mountain+weather+report
- http://files.palmandbowl.co.uk/uploads/1/3/0/7/130776460/7973499.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/9508/9571/files/articulos_cientificos_de_biologia_2020.pdf
- https://cdn.shopify.com/s/files/1/0436/0303/4276/files/75094266445.pdf
- https://cdn.shopify.com/s/files/1/0434/5397/2633/files/11982930406.pdf
- https://cdn.shopify.com/s/files/1/0434/2402/2680/files/pepofopesudofelajeja.pdf
- https://cdn.shopify.com/s/files/1/0432/8125/2512/files/duketurajobokatezume.pdf
- https://cdn.shopify.com/s/files/1/0434/3191/9765/files/el_cambio_climatico_no_existe.pdf
- https://cdn.shopify.com/s/files/1/0432/6948/8798/files/1000_rounds_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0428/9950/5311/files/wunotexukul.pdf
- https://cdn.shopify.com/s/files/1/0437/5438/9665/files/71989351596.pdf
- https://cdn.shopify.com/s/files/1/0435/2301/4824/files/gipexegoxinenofukedawu.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_off00005dee.bin` `b0f7095c965fd4b8810376b5e0ce8f649dbf0baabb9477364b3d044c4131298f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DEE	5196 bytes
`font_01_sfnt_off00006f83.bin` `68b5c54b27683dcb4d7e792a481b6eb706afe6cfbf22c39c13d4c8542d520975`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F83	15012 bytes

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