PDF malware analysis — malicious · b223f72b6c7dacb8

MALICIOUS

PDF

52.4 KB Created: 2020-07-30 23:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02f3492a0160d59c39d320b1e526f9e6 SHA-1: f932a7992c0d732a0f470d93bb3fba90b5fca5d5 SHA-256: b223f72b6c7dacb8f1b1a47708a4fffd098c876203d4d41574416efc8c6b7361

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics indicating it is a malicious redirector and part of a link farm. It contains numerous embedded URLs, with at least one pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its direct lure, but the extensive use of external links strongly suggests a traffic redirection or SEO poisoning attack.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=caffeine+citrate+package+insert+pdf
- http://files.mingateachers.com/uploads/1/3/1/3/131384414/3794204bfe2.pdf
- http://files.acdavisbass.com/uploads/1/3/0/9/130969754/458cf81ed37.pdf
- http://files.woodcraftguildtasmaniainc.com/uploads/1/3/0/8/130814340/830762.pdf
- http://files.woodcraftguildtasmaniainc.com/uploads/1/3/0/8/130814340/830
- https://cdn.shopify.com/s/files/1/0432/9802/9733/files/31870004188.pdf
- https://cdn.shopify.com/s/files/1/0432/0064/3236/files/luvipaged.pdf
- https://cdn.shopify.com/s/files/1/0429/2981/5705/files/dakimepaselunanilunabexer.pdf
- https://cdn.shopify.com/s/files/1/0433/4636/2523/files/5428556901.pdf
- https://cdn.shopify.com/s/files/1/0431/2530/9601/files/jomovulovobuwi.pdf
- https://cdn.shopify.com/s/files/1/0437/3102/6071/files/doduxenuwawubopoba.pdf
- https://cdn.shopify.com/s/files/1/0433/1352/8987/files/86154867770.pdf
- https://cdn.shopify.com/s/files/1/0435/8035/8811/files/86170090017.pdf
- https://cdn.shopify.com/s/files/1/0436/9219/5993/files/savekano.pdf
- https://cdn.shopify.com/s/files/1/0431/6053/5196/files/tabatomamudupogubusavupif.pdf
- https://cdn.shopify.com/s/files/1/0429/6481/1927/files/kapuxogokawafibed.pdf
- https://cdn.shopify.com/s/files/1/0430/4614/2114/files/49117384003.pdf
- https://cdn.shopify.com/s/files/1/0437/1356/0727/files/tususiwade.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009001.bin` `0e376b8455fc4e5d4fd1956140a6b35cd329ae8956cec5fabeca0e9f144443cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9001	5056 bytes
`font_01_sfnt_off0000a14a.bin` `c0ce5ee48aee4875daf3f3a789b11c038cef435c2bc942b6d72341dadcb30a3a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA14A	10272 bytes

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