PDF malware analysis — malicious · 6f312db8b988c634

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 17:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 772bf406322dad5404ccc8ae82cd82c6 SHA-1: 4071e49bdf3c4ac9d1aee5f0931469784b13f577 SHA-256: 6f312db8b988c634a6b1e683bc4b70a3b6212b6098d4d40cf87f8999ad2347b0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=cherished+number+transfer+form', is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains text related to a transfer form, suggesting a social engineering lure.

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=cherished+number+transfer+form
- http://rowenuk.cmbuilders.org/uploads/1/3/0/7/130775363/fekedabomomomuk.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0436/9242/5384/files/39034705666.pdf
- https://cdn.shopify.com/s/files/1/0433/4750/9416/files/11528301685.pdf
- https://cdn.shopify.com/s/files/1/0431/8307/9592/files/77721394303.pdf
- https://cdn.shopify.com/s/files/1/0432/5575/9011/files/52272092010.pdf
- https://cdn.shopify.com/s/files/1/0435/4329/8207/files/76898226599.pdf
- https://cdn.shopify.com/s/files/1/0431/7301/9797/files/tezevebanawebiw.pdf
- https://cdn.shopify.com/s/files/1/0433/2093/4558/files/37204713778.pdf
- https://cdn.shopify.com/s/files/1/0437/9800/3874/files/fewizoze.pdf
- https://cdn.shopify.com/s/files/1/0434/5472/6310/files/29774361664.pdf
- https://cdn.shopify.com/s/files/1/0428/9249/2963/files/assessment_guidelines.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_off00005ed4.bin` `b2d765666a25f5b8950bf220e591d066547b294edcb3d463eda8be4d7b388181`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ED4	5160 bytes
`font_01_sfnt_off00007022.bin` `ad569624e7241b0743bb206056aaeb509a25876a94f13bb335d6130fcbb1a668`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7022	10096 bytes

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