PDF malware analysis — malicious · d1f44418f8c7d4d9

MALICIOUS

PDF

40.6 KB Created: 2020-07-27 23:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f000717c806c80d7677b21c116218a93 SHA-1: c79a8e82603289b19f94008c9e16edda925a494a SHA-256: d1f44418f8c7d4d912291ebeb62e3a18851f49a73e2e1e8b303add2912dfee2e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with multiple links pointing to Shopify domains and one critical link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'wallpapers', likely an SEO poisoning tactic to drive traffic to the malicious redirector.

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=hd+wallpapers+for+iphone+6s+free
- http://files.aaron-delane.com/uploads/1/3/0/7/130776861/23c07598b.pdf
- http://files.decadesvintage.co.uk/uploads/1/3/1/6/131606035/9107723.pdf
- http://files.icehorizons.com/uploads/1/3/1/4/131483149/a417b62864a0.pdf
- https://cdn.shopify.com/s/files/1/0429/7159/4911/files/79360201011.pdf
- https://cdn.shopify.com/s/files/1/0432/8731/4585/files/letunudoxu.pdf
- https://cdn.shopify.com/s/files/1/0427/9340/2534/files/relotide.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
- https://cdn.shopify.com/s/files/1/0437/3915/2535/files/kegumegeruxotu.pdf
- https://cdn.shopify.com/s/files/1/0430/6314/8706/files/nerefe.pdf
- https://cdn.shopify.com/s/files/1/0431/8468/5224/files/12605869087.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
- https://cdn.shopify.com/s/files/1/0434/4663/2614/files/zefox.pdf
- https://cdn.shopify.com/s/files/1/0439/2887/9272/files/25304428890.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/
- https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000061cb.bin` `69e5e7f8293047503f76566da83ca1193fb31750b742974d7a354e4f436bfec8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61CB	5044 bytes
`font_01_sfnt_off000072e8.bin` `73b2f6c0476079e6fd537ac49d12275d147edefd0a972964a918414a42c29000`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72E8	10100 bytes

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